diff --git a/strategies/shared/signals/selectors.py b/strategies/shared/signals/selectors.py
index 4797ffe..5f55cc6 100644
--- a/strategies/shared/signals/selectors.py
+++ b/strategies/shared/signals/selectors.py
@@ -205,8 +205,9 @@ class TopNSelector(SignalGenerator):
             return False  # 组合完全相同，不调仓
         
         # 计算新旧组合的总得分
-        old_total = sum(float(row.get(col, 0)) for col in factor_cols if col in old_codes)
-        new_total = sum(float(row.get(col, 0)) for col in factor_cols if col in new_codes)
+        # 修复: 按实际份数计算得分（支持重复代码如"931862.CSI,931862.CSI"）
+        old_total = sum(float(row.get(c, 0)) for c in old_codes)
+        new_total = sum(float(row.get(c, 0)) for c in new_codes)
         
         # 新组合得分需超过当前组合一定比例才调仓
         # 即使 threshold=0，也要确保 new_total >= old_total
@@ -247,15 +248,13 @@ class TopNSelector(SignalGenerator):
         selected = [code for code, score in sorted_champions[:self.select_num]]
         
         # V3: 空余仓位填充短债
+        # 短债填充是防御机制，不应受阈值过滤影响
         if cfg.get('fill_bond', False) and bond_code:
             n_bond_slots = self.select_num - len(selected)
             if n_bond_slots > 0:
-                # 检查短债是否满足阈值条件（需在原始scores中存在）
-                bond_score = scores.get(bond_code, None)
-                if bond_score is not None:
-                    # 用短债代码填充空余仓位（可能重复填充多次）
-                    for _ in range(n_bond_slots):
-                        selected.append(bond_code)
+                # 修复: 无条件填充短债（防御仓位不应依赖动量阈值）
+                for _ in range(n_bond_slots):
+                    selected.append(bond_code)
         
         return selected