diff --git a/backend/api/routes/account.py b/backend/api/routes/account.py
index 40e4529..ccde550 100644
--- a/backend/api/routes/account.py
+++ b/backend/api/routes/account.py
@@ -1629,8 +1629,8 @@ async def sync_positions(account_id: int = Depends(get_account_id)):
                         except Exception:
                             latest_close_order = None
 
-                        # 获取该交易对的所有open记录
-                        open_trades = Trade.get_by_symbol(symbol, status='open')
+                        # 获取该交易对的 open 记录（仅当前账号，避免误更新其他账号）
+                        open_trades = Trade.get_by_symbol(symbol, status='open', account_id=account_id)
                         
                         for trade in open_trades:
                             trade_id = trade['id']
diff --git a/trading_system/binance_client.py b/trading_system/binance_client.py
index d0d1ae3..b753dcc 100644
--- a/trading_system/binance_client.py
+++ b/trading_system/binance_client.py
@@ -759,18 +759,25 @@ class BinanceClient:
             try:
                 # 增加 recvWindow 以避免 -1021 错误
                 positions = await self.client.futures_position_information(recvWindow=20000)
-                open_positions = [
-                    {
+                # 只保留真实持仓：非零且名义价值 >= 1 USDT，避免灰尘持仓被当成“有仓”导致同步时批量创建假 manual_entry
+                min_notional = 1.0
+                open_positions = []
+                for pos in positions:
+                    amt = float(pos['positionAmt'])
+                    if amt == 0:
+                        continue
+                    entry_price = float(pos['entryPrice'])
+                    notional = abs(amt) * entry_price
+                    if notional < min_notional:
+                        continue
+                    open_positions.append({
                         'symbol': pos['symbol'],
-                        'positionAmt': float(pos['positionAmt']),
-                        'entryPrice': float(pos['entryPrice']),
+                        'positionAmt': amt,
+                        'entryPrice': entry_price,
                         'markPrice': float(pos.get('markPrice', 0)),
                         'unRealizedProfit': float(pos['unRealizedProfit']),
                         'leverage': int(pos['leverage'])
-                    }
-                    for pos in positions 
-                    if float(pos['positionAmt']) != 0
-                ]
+                    })
                 return open_positions
             except (asyncio.TimeoutError, BinanceAPIException) as e:
                 last_error = e
diff --git a/trading_system/position_manager.py b/trading_system/position_manager.py
index cf7a7a6..c88012e 100644
--- a/trading_system/position_manager.py
+++ b/trading_system/position_manager.py
@@ -2799,12 +2799,15 @@ class PositionManager:
                         quantity = abs(position_amt)
                         side = 'BUY' if position_amt > 0 else 'SELL'
                         
+                        notional = (float(entry_price) * float(quantity)) if entry_price and quantity else 0
+                        if notional < 1.0:
+                            logger.debug(f"{symbol} [状态同步] 跳过灰尘持仓 (名义 {notional:.4f} USDT < 1)，不创建记录")
+                            continue
                         logger.info(
                             f"{symbol} [状态同步] 检测到手动开仓，创建数据库记录... "
                             f"({side} {quantity:.4f} @ {entry_price:.4f})"
                         )
-                        
-                        # 创建数据库记录
+                        # 创建数据库记录（显式传入 account_id，避免多账号混用）
                         trade_id = Trade.create(
                             symbol=symbol,
                             side=side,
@@ -2812,9 +2815,9 @@ class PositionManager:
                             entry_price=entry_price,
                             leverage=binance_position.get('leverage', 10),
                             entry_reason='manual_entry',  # 标记为手动开仓
-                            # 手动开仓无法拿到策略侧ATR/分步止盈，这里尽量补齐“规模字段”
-                            notional_usdt=(float(entry_price) * float(quantity)) if entry_price and quantity else None,
-                            margin_usdt=((float(entry_price) * float(quantity)) / float(binance_position.get('leverage', 10))) if entry_price and quantity and float(binance_position.get('leverage', 10) or 0) > 0 else None,
+                            notional_usdt=notional,
+                            margin_usdt=(notional / float(binance_position.get('leverage', 10) or 10)) if float(binance_position.get('leverage', 10) or 0) > 0 else None,
+                            account_id=self.account_id,
                         )
                         
                         logger.info(f"{symbol} [状态同步] ✓ 数据库记录已创建 (ID: {trade_id})")