diff --git a/client/src/store/journeyStore.test.ts b/client/src/store/journeyStore.test.ts
index 564969ec..d5c7a2a3 100644
--- a/client/src/store/journeyStore.test.ts
+++ b/client/src/store/journeyStore.test.ts
@@ -355,6 +355,37 @@ describe('journeyStore', () => {
     expect(useJourneyStore.getState().loading).toBe(false);
   });
 
+  // ── reorderEntries ───────────────────────────────────────────────────────
+
+  it('FE-STORE-JOURNEY-018: reorderEntries reorders by sort_order not entry_time', async () => {
+    const a = buildEntry({ id: 201, entry_date: '2026-04-01', entry_time: '09:00', sort_order: 0 });
+    const b = buildEntry({ id: 202, entry_date: '2026-04-01', entry_time: '11:00', sort_order: 1 });
+    const c = buildEntry({ id: 203, entry_date: '2026-04-01', entry_time: '14:00', sort_order: 2 });
+    const detail = buildJourneyDetail({ id: 55, entries: [a, b, c] });
+    useJourneyStore.setState({ current: detail });
+
+    server.use(
+      http.put('/api/journeys/55/entries/reorder', () => HttpResponse.json({ success: true }))
+    );
+    await useJourneyStore.getState().reorderEntries(55, [202, 201, 203]);
+    const ids = useJourneyStore.getState().current?.entries.map(e => e.id);
+    expect(ids).toEqual([202, 201, 203]);
+  });
+
+  it('FE-STORE-JOURNEY-019: reorderEntries rolls back on API failure', async () => {
+    const a = buildEntry({ id: 211, entry_date: '2026-04-01', sort_order: 0 });
+    const b = buildEntry({ id: 212, entry_date: '2026-04-01', sort_order: 1 });
+    const detail = buildJourneyDetail({ id: 56, entries: [a, b] });
+    useJourneyStore.setState({ current: detail });
+
+    server.use(
+      http.put('/api/journeys/56/entries/reorder', () => HttpResponse.json({}, { status: 403 }))
+    );
+    await expect(useJourneyStore.getState().reorderEntries(56, [212, 211])).rejects.toBeTruthy();
+    const ids = useJourneyStore.getState().current?.entries.map(e => e.id);
+    expect(ids).toEqual([211, 212]);
+  });
+
   // ── clear ────────────────────────────────────────────────────────────────
 
   it('FE-STORE-JOURNEY-015: clear resets state', () => {
diff --git a/client/src/store/journeyStore.ts b/client/src/store/journeyStore.ts
index 47b75971..c2edfa69 100644
--- a/client/src/store/journeyStore.ts
+++ b/client/src/store/journeyStore.ts
@@ -223,10 +223,8 @@ export const useJourneyStore = create<JourneyState>((set, get) => ({
       )
       entries.sort((a, b) => {
         if (a.entry_date !== b.entry_date) return a.entry_date.localeCompare(b.entry_date)
-        const atime = a.entry_time || ''
-        const btime = b.entry_time || ''
-        if (atime !== btime) return atime.localeCompare(btime)
-        return (a.sort_order || 0) - (b.sort_order || 0)
+        if (a.sort_order !== b.sort_order) return (a.sort_order || 0) - (b.sort_order || 0)
+        return a.id - b.id
       })
       return { current: { ...s.current, entries } }
     })
diff --git a/server/src/db/migrations.ts b/server/src/db/migrations.ts
index 46f48e8c..29640339 100644
--- a/server/src/db/migrations.ts
+++ b/server/src/db/migrations.ts
@@ -2107,6 +2107,29 @@ function runMigrations(db: Database.Database): void {
               != substr(reservations.reservation_time, 1, 10)
       `);
     },
+    // #846: make sort_order authoritative within a day. Previous ORDER BY put
+    // entry_time before sort_order, silently ignoring reorder clicks when two
+    // same-date entries had different times. Backfill renumbers using the old
+    // effective key (entry_time ASC, id ASC) so existing journeys retain their
+    // current visual order.
+    () => {
+      db.exec(`
+        WITH ranked AS (
+          SELECT id,
+                 ROW_NUMBER() OVER (
+                   PARTITION BY journey_id, entry_date
+                   ORDER BY entry_time ASC, id ASC
+                 ) - 1 AS rn
+          FROM journey_entries
+        )
+        UPDATE journey_entries
+        SET sort_order = (SELECT rn FROM ranked WHERE ranked.id = journey_entries.id)
+      `);
+      db.exec(
+        'CREATE INDEX IF NOT EXISTS idx_journey_entries_order ' +
+        'ON journey_entries(journey_id, entry_date, sort_order)'
+      );
+    },
   ];
 
   if (currentVersion < migrations.length) {
diff --git a/server/src/services/journeyService.ts b/server/src/services/journeyService.ts
index a03d1fea..afa6c7b3 100644
--- a/server/src/services/journeyService.ts
+++ b/server/src/services/journeyService.ts
@@ -120,7 +120,7 @@ export function getJourneyFull(journeyId: number, userId: number) {
   if (!journey) return null;
 
   const entries = db.prepare(
-    'SELECT * FROM journey_entries WHERE journey_id = ? ORDER BY entry_date ASC, entry_time ASC, sort_order ASC'
+    'SELECT * FROM journey_entries WHERE journey_id = ? ORDER BY entry_date ASC, sort_order ASC, id ASC'
   ).all(journeyId) as JourneyEntry[];
 
   const photos = db.prepare(
@@ -306,12 +306,21 @@ export function syncTripPlaces(journeyId: number, tripId: number, authorId: numb
   ).all(journeyId, tripId) as { source_place_id: number }[];
   const existingPlaceIds = new Set(existing.map(e => e.source_place_id));
 
+  // Track next sort_order per date so synced skeletons get unique, sequential positions.
+  const dateMaxOrder = new Map<string, number>();
+  const maxRows = db.prepare(
+    'SELECT entry_date, COALESCE(MAX(sort_order), -1) AS m FROM journey_entries WHERE journey_id = ? GROUP BY entry_date'
+  ).all(journeyId) as { entry_date: string; m: number }[];
+  for (const row of maxRows) dateMaxOrder.set(row.entry_date, row.m);
+
   for (const place of places) {
     if (existingPlaceIds.has(place.id)) continue;
     existingPlaceIds.add(place.id);
 
     const entryDate = place.day_date || new Date().toISOString().split('T')[0];
     const entryTime = place.assignment_time || place.place_time || null;
+    const nextOrder = (dateMaxOrder.get(entryDate) ?? -1) + 1;
+    dateMaxOrder.set(entryDate, nextOrder);
 
     db.prepare(`
       INSERT INTO journey_entries (journey_id, source_trip_id, source_place_id, author_id, type, title, entry_date, entry_time, location_name, location_lat, location_lng, sort_order, created_at, updated_at)
@@ -320,7 +329,7 @@ export function syncTripPlaces(journeyId: number, tripId: number, authorId: numb
       journeyId, tripId, place.id, authorId,
       place.name, entryDate, entryTime,
       place.address || place.name, place.lat || null, place.lng || null,
-      place.day_number || 0, now, now
+      nextOrder, now, now
     );
   }
 }
@@ -367,15 +376,19 @@ export function onPlaceCreated(tripId: number, placeId: number) {
 
     const journey = db.prepare('SELECT user_id FROM journeys WHERE id = ?').get(link.journey_id) as { user_id: number };
     const entryDate = place.day_date;
+    const maxOrder = db.prepare(
+      'SELECT MAX(sort_order) AS m FROM journey_entries WHERE journey_id = ? AND entry_date = ?'
+    ).get(link.journey_id, entryDate) as { m: number | null };
+    const nextOrder = (maxOrder?.m ?? -1) + 1;
 
     db.prepare(`
       INSERT INTO journey_entries (journey_id, source_trip_id, source_place_id, author_id, type, title, entry_date, entry_time, location_name, location_lat, location_lng, sort_order, created_at, updated_at)
-      VALUES (?, ?, ?, ?, 'skeleton', ?, ?, ?, ?, ?, ?, 0, ?, ?)
+      VALUES (?, ?, ?, ?, 'skeleton', ?, ?, ?, ?, ?, ?, ?, ?, ?)
     `).run(
       link.journey_id, tripId, placeId, journey.user_id,
       place.name, entryDate, place.assignment_time || place.place_time || null,
       place.address || place.name, place.lat || null, place.lng || null,
-      now, now
+      nextOrder, now, now
     );
   }
 }
@@ -451,7 +464,7 @@ export function listEntries(journeyId: number, userId: number) {
   if (!canAccessJourney(journeyId, userId)) return null;
 
   const entries = db.prepare(
-    'SELECT * FROM journey_entries WHERE journey_id = ? ORDER BY entry_date ASC, entry_time ASC, sort_order ASC'
+    'SELECT * FROM journey_entries WHERE journey_id = ? ORDER BY entry_date ASC, sort_order ASC, id ASC'
   ).all(journeyId) as JourneyEntry[];
 
   const photos = db.prepare(
diff --git a/server/tests/unit/services/journeyService.test.ts b/server/tests/unit/services/journeyService.test.ts
index 950eff04..82b14d55 100644
--- a/server/tests/unit/services/journeyService.test.ts
+++ b/server/tests/unit/services/journeyService.test.ts
@@ -68,6 +68,7 @@ import {
   removeContributor,
   getSuggestions,
   syncTripPlaces,
+  reorderEntries,
   onPlaceCreated,
   onPlaceUpdated,
   onPlaceDeleted,
@@ -1465,3 +1466,108 @@ describe('addProviderPhoto — passphrase', () => {
     expect(row?.passphrase).not.toBe('secret-pp');
   });
 });
+
+// -- reorderEntries (#846) ----------------------------------------------------
+
+function insertEntry(journeyId: number, authorId: number, opts: { entry_date: string; entry_time?: string | null; sort_order?: number }): { id: number } {
+  const now = Date.now();
+  const res = testDb.prepare(`
+    INSERT INTO journey_entries (journey_id, author_id, type, entry_date, entry_time, sort_order, visibility, created_at, updated_at)
+    VALUES (?, ?, 'entry', ?, ?, ?, 'private', ?, ?)
+  `).run(journeyId, authorId, opts.entry_date, opts.entry_time ?? null, opts.sort_order ?? 0, now, now);
+  return { id: Number(res.lastInsertRowid) };
+}
+
+describe('reorderEntries', () => {
+  it('JOURNEY-SVC-089: reorder persists and listEntries returns requested order regardless of entry_time', () => {
+    const { user } = createUser(testDb);
+    const journey = createJourney(testDb, user.id);
+    const e1 = insertEntry(journey.id, user.id, { entry_date: '2026-08-01', entry_time: '09:00', sort_order: 0 });
+    const e2 = insertEntry(journey.id, user.id, { entry_date: '2026-08-01', entry_time: '14:00', sort_order: 1 });
+
+    const ok = reorderEntries(journey.id, user.id, [e2.id, e1.id]);
+    expect(ok).toBe(true);
+
+    const entries = listEntries(journey.id, user.id)!;
+    const dayEntries = entries.filter(e => e.entry_date === '2026-08-01');
+    expect(dayEntries.map(e => e.id)).toEqual([e2.id, e1.id]);
+  });
+
+  it('JOURNEY-SVC-090: reorderEntries rejects ids from another journey', () => {
+    const { user } = createUser(testDb);
+    const j1 = createJourney(testDb, user.id);
+    const j2 = createJourney(testDb, user.id);
+    const entry = createJourneyEntry(testDb, j2.id, user.id, { entry_date: '2026-08-02' });
+
+    const ok = reorderEntries(j1.id, user.id, [entry.id]);
+    expect(ok).toBe(false);
+  });
+
+  it('JOURNEY-SVC-091: reorderEntries does not affect entries on other days', () => {
+    const { user } = createUser(testDb);
+    const journey = createJourney(testDb, user.id);
+    const day1a = insertEntry(journey.id, user.id, { entry_date: '2026-08-01', sort_order: 0 });
+    const day1b = insertEntry(journey.id, user.id, { entry_date: '2026-08-01', sort_order: 1 });
+    const day2 = insertEntry(journey.id, user.id, { entry_date: '2026-08-02', sort_order: 0 });
+
+    reorderEntries(journey.id, user.id, [day1b.id, day1a.id]);
+
+    const entries = listEntries(journey.id, user.id)!;
+    const day2Entry = entries.find(e => e.id === day2.id)!;
+    expect(day2Entry.sort_order).toBe(0);
+  });
+});
+
+describe('syncTripPlaces sort_order', () => {
+  it('JOURNEY-SVC-092: assigns unique sequential sort_order per date for same-day places', () => {
+    const { user } = createUser(testDb);
+    const journey = createJourney(testDb, user.id);
+    const trip = createTrip(testDb, user.id, {
+      title: 'Order Trip',
+      start_date: '2026-09-01',
+      end_date: '2026-09-02',
+    });
+    const day = testDb.prepare('SELECT id FROM days WHERE trip_id = ? ORDER BY date ASC LIMIT 1').get(trip.id) as { id: number };
+    const p1 = createPlace(testDb, trip.id, { name: 'Place A' });
+    const p2 = createPlace(testDb, trip.id, { name: 'Place B' });
+    const p3 = createPlace(testDb, trip.id, { name: 'Place C' });
+    createDayAssignment(testDb, day.id, p1.id);
+    createDayAssignment(testDb, day.id, p2.id);
+    createDayAssignment(testDb, day.id, p3.id);
+
+    syncTripPlaces(journey.id, trip.id, user.id);
+
+    const rows = testDb.prepare(
+      'SELECT sort_order FROM journey_entries WHERE journey_id = ? ORDER BY sort_order ASC'
+    ).all(journey.id) as { sort_order: number }[];
+    const orders = rows.map(r => r.sort_order);
+    expect(new Set(orders).size).toBe(orders.length);
+    expect(orders).toEqual([0, 1, 2]);
+  });
+});
+
+describe('onPlaceCreated sort_order', () => {
+  it('JOURNEY-SVC-093: assigns MAX+1 sort_order when entries already exist on the target date', () => {
+    const { user } = createUser(testDb);
+    const journey = createJourney(testDb, user.id);
+    const trip = createTrip(testDb, user.id, {
+      title: 'Append Trip',
+      start_date: '2026-10-01',
+      end_date: '2026-10-02',
+    });
+    addTripToJourney(journey.id, trip.id, user.id);
+
+    const day = testDb.prepare('SELECT id, date FROM days WHERE trip_id = ? ORDER BY date ASC LIMIT 1').get(trip.id) as { id: number; date: string };
+    insertEntry(journey.id, user.id, { entry_date: day.date, sort_order: 5 });
+
+    const place = createPlace(testDb, trip.id, { name: 'Late Addition' });
+    createDayAssignment(testDb, day.id, place.id);
+    onPlaceCreated(trip.id, place.id);
+
+    const newEntry = testDb.prepare(
+      'SELECT sort_order FROM journey_entries WHERE journey_id = ? AND source_place_id = ?'
+    ).get(journey.id, place.id) as { sort_order: number } | undefined;
+    expect(newEntry).toBeDefined();
+    expect(newEntry!.sort_order).toBe(6);
+  });
+});