diff --git a/ft-app/app/collector.py b/ft-app/app/collector.py
index 500de38..242cc80 100644
--- a/ft-app/app/collector.py
+++ b/ft-app/app/collector.py
@@ -52,6 +52,7 @@ def sync_contract_bars_bg(contract_code: str) -> bool:
             with _lock:
                 _progress["total"] = len(bars)
 
+            total_bars = len(bars)
             inserted = 0
             min_date = None
             for i, bar in enumerate(bars):
@@ -71,6 +72,7 @@ def sync_contract_bars_bg(contract_code: str) -> bool:
                         min_date = bar["date"]
                 with _lock:
                     _progress["done"] = i + 1
+                    _progress["label"] = f"同步行情 {code} · {i + 1}/{total_bars} 条"
 
             if inserted > 0:
                 db.flush()
@@ -102,10 +104,19 @@ def sync_positions_bg(contract_code: str) -> bool:
                 .filter(DailyBar.contract == code)
                 .order_by(DailyBar.date).all()
             ]
-            missing = [d for d in bar_dates if d not in existing_dates]
+            # Only sync dates within or after existing position date range;
+            # akshare may not have data for very old dates
+            if existing_dates:
+                min_pos = min(existing_dates)
+                missing = [d for d in bar_dates if d not in existing_dates and d >= min_pos]
+            else:
+                missing = [d for d in bar_dates if d not in existing_dates]
+            total_missing = len(missing)
 
             with _lock:
-                _progress["total"] = len(missing)
+                _progress["total"] = total_missing
+                if total_missing == 0:
+                    _progress["label"] = f"同步持仓 {code} · 已是最新"
 
             inserted = 0
             for i, d in enumerate(missing):
@@ -120,8 +131,7 @@ def sync_positions_bg(contract_code: str) -> bool:
                 db.flush()
                 with _lock:
                     _progress["done"] = i + 1
-
-            db.commit()
+                    _progress["label"] = f"同步持仓 {code} · {i + 1}/{total_missing} 天"
         finally:
             db.close()
 
diff --git a/ft-app/app/templates/admin.html b/ft-app/app/templates/admin.html
index 1b17d92..8d05962 100644
--- a/ft-app/app/templates/admin.html
+++ b/ft-app/app/templates/admin.html
@@ -193,8 +193,10 @@
 
 <script>
 var syncTimer = null;
+var progressShownAt = 0;
 
 function showProgress() {
+  progressShownAt = Date.now();
   document.getElementById('sync-progress').style.display = 'block';
   document.getElementById('sync-progress-bar').style.width = '0%';
   document.getElementById('sync-progress-pct').textContent = '';
@@ -203,6 +205,7 @@ function showProgress() {
 
 function hideProgress() {
   clearInterval(syncTimer);
+  syncTimer = null;
   document.getElementById('sync-progress').style.display = 'none';
 }
 
@@ -216,23 +219,27 @@ function pollProgress() {
       document.getElementById('sync-progress-label').textContent = data.label;
 
       if (data.finished) {
-        clearInterval(syncTimer);
-        document.getElementById('sync-progress-bar').style.width = '100%';
-        document.getElementById('sync-progress-pct').textContent = '100%';
-        document.getElementById('sync-progress-label').textContent = data.label + ' 完成';
-        document.getElementById('sync-progress-pct').textContent = '✓';
+        var elapsed = Date.now() - progressShownAt;
+        var delay = elapsed < 1000 ? 1000 - elapsed : 0;
+        setTimeout(function() {
+          clearInterval(syncTimer);
+          syncTimer = null;
+          document.getElementById('sync-progress-bar').style.width = '100%';
+          document.getElementById('sync-progress-label').textContent = data.label + ' ✓';
+          document.getElementById('sync-progress-pct').textContent = '';
+        }, delay);
       }
     });
 }
 
 function startSync(url) {
-  if (syncTimer) { clearInterval(syncTimer); }
+  if (syncTimer) { clearInterval(syncTimer); syncTimer = null; }
   showProgress();
   fetch(url, { method: 'POST' })
     .then(function(r) { return r.json(); })
     .then(function(data) {
       if (!data.ok) { hideProgress(); return; }
-      syncTimer = setInterval(pollProgress, 600);
+      syncTimer = setInterval(pollProgress, 500);
     });
 }