diff --git a/frontend/templates/admin_submission.html b/frontend/templates/admin_submission.html
index 10c80d6..7085948 100644
--- a/frontend/templates/admin_submission.html
+++ b/frontend/templates/admin_submission.html
@@ -22,7 +22,7 @@
                 <a v-for="(name, group) in groups" href="#" :class="{selected: filters.group===group}" @click.prevent="change_filter({group: group})">{{ name }}</a>
             </p>
             <div class="results">
-                <table v-if="!filter.violations" id="result_list">
+                <table v-if="!filters.violations" id="result_list">
                     <thead>
                     <tr>
                         <th scope="col"><div class="text"><span>#</span></div><div class="clear"></div></th>
@@ -169,10 +169,10 @@
                 this.refresh();
             },
             show_user(pk) {
-                if (users[obj.user]) {
-                    return `${obj.user}.${users[obj.user]}`;
+                if (this.users[pk]) {
+                    return `${pk}.${this.users[pk]}`;
                 } else {
-                    return `${obj.user}`;
+                    return `${pk}`;
                 }
             },
         },
diff --git a/server/challenge/interface.py b/server/challenge/interface.py
index be5c896..1541f9f 100644
--- a/server/challenge/interface.py
+++ b/server/challenge/interface.py
@@ -121,7 +121,7 @@ def check_flag_with_violations(self, text):
                 if len(matches) == 1:
                     violations.append((self._context.user.pk, f"在题目 {flags[i]['name']} 中提交了 ID 为 {matches[0].user} 的选手的 flag"))
                     violations.append((matches[0].user, f"在题目 {flags[i]['name']} 中被 ID 为 {self._context.user.pk} 的选手提交了自己的 flag"))
-                else:
+                elif len(matches) > 1:
                     violations.append((self._context.user.pk, f"在题目 {flags[i]['name']} 中提交了其他 {len(matches)} 名选手的 flag"))
         return [], violations