diff --git a/backend/.env.example b/backend/.env.example
index 2cf31d2..cf881e6 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -20,7 +20,7 @@ CORS_ORIGINS=*
 PUBLIC_ORIGIN=http://localhost:8080
 
 # 투표 윈도우 (도메인 규칙)
-VOTE_OPEN_HOURS_BEFORE=48      # 오픈 = 킥오프 D-2
+VOTE_OPEN_HOURS_BEFORE=168     # 오픈 = 킥오프 D-7
 VOTE_LOCK_MINUTES_BEFORE=5     # 마감 = 킥오프 5분 전
 DEMO_FORCE_OPEN=true           # 운영 배포 시 false
 
diff --git a/backend/app/config.py b/backend/app/config.py
index ba68a9c..24b6292 100644
--- a/backend/app/config.py
+++ b/backend/app/config.py
@@ -50,8 +50,8 @@ class Settings(BaseSettings):
     public_origin: str = "http://localhost:8080"  # 공유 딥링크 베이스
 
     # ── 투표 윈도우 (도메인 규칙) ─────────────────────────────
-    # 오픈 = 킥오프 - VOTE_OPEN_HOURS_BEFORE (D-5 = 120h)
-    vote_open_hours_before: int = 120
+    # 오픈 = 킥오프 - VOTE_OPEN_HOURS_BEFORE (D-7 = 168h)
+    vote_open_hours_before: int = 168
     # 마감 = 킥오프 5분 전 (경기 시작 5분 전까지 투표). lock 오프셋(분).
     vote_lock_minutes_before: int = 5
     # 데모: True 면 오픈 게이트 무시(항상 투표 가능). 운영 배포 시 False.
diff --git a/backend/app/routers/admin.py b/backend/app/routers/admin.py
index 4393ea2..c495b2b 100644
--- a/backend/app/routers/admin.py
+++ b/backend/app/routers/admin.py
@@ -8,7 +8,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from ..config import settings
 from ..database import get_db
 from ..domain import now_utc
-from ..models import AIPrediction, Match, PageVisit
+from ..models import AIPrediction, CrowdStats, Match, PageVisit, UserPrediction
 from ..schemas import AdminAIPredictionIn, AdminSetResultIn, DailyVisitOut, GenericOk
 from ..services.grading import apply_result
 
@@ -85,3 +85,50 @@ async def daily_visits(db: AsyncSession = Depends(get_db)) -> list[DailyVisitOut
         )
     ).all()
     return [DailyVisitOut(date=d.isoformat(), uniqueVisitors=c) for d, c in rows]
+
+
+@router.post(
+    "/recount-crowd", response_model=GenericOk, dependencies=[Depends(require_admin)]
+)
+async def recount_crowd(db: AsyncSession = Depends(get_db)) -> GenericOk:
+    """crowd_stats 를 user_predictions(진실 원천)에서 재집계.
+
+    과거 같은 outcome 재제출로 팀 컬럼만 부풀려진(=합 100% 초과) 행을 복구한다.
+    """
+    # 경기별 outcome 분포 집계
+    rows = (
+        await db.execute(
+            select(
+                UserPrediction.match_id,
+                UserPrediction.outcome,
+                func.count(),
+            ).group_by(UserPrediction.match_id, UserPrediction.outcome)
+        )
+    ).all()
+
+    tally: dict[str, dict[str, int]] = {}
+    for match_id, outcome, c in rows:
+        t = tally.setdefault(
+            match_id, {"total": 0, "team_a_win": 0, "draw": 0, "team_b_win": 0}
+        )
+        col = {"TEAM_A_WIN": "team_a_win", "DRAW": "draw", "TEAM_B_WIN": "team_b_win"}[outcome]
+        t[col] += c
+        t["total"] += c
+
+    stats = (await db.execute(select(CrowdStats))).scalars().all()
+    fixed = 0
+    for s in stats:
+        t = tally.get(s.match_id, {"total": 0, "team_a_win": 0, "draw": 0, "team_b_win": 0})
+        if (
+            s.total != t["total"]
+            or s.team_a_win != t["team_a_win"]
+            or s.draw != t["draw"]
+            or s.team_b_win != t["team_b_win"]
+        ):
+            s.total = t["total"]
+            s.team_a_win = t["team_a_win"]
+            s.draw = t["draw"]
+            s.team_b_win = t["team_b_win"]
+            fixed += 1
+    await db.commit()
+    return GenericOk(ok=True, detail="crowd recounted", extra={"matchesFixed": fixed})
diff --git a/backend/app/routers/predictions.py b/backend/app/routers/predictions.py
index cfed9ab..3f75358 100644
--- a/backend/app/routers/predictions.py
+++ b/backend/app/routers/predictions.py
@@ -26,14 +26,20 @@ _COL = {"TEAM_A_WIN": "team_a_win", "DRAW": "draw", "TEAM_B_WIN": "team_b_win"}
 async def _adjust_crowd(
     db: AsyncSession, match_id: str, *, add: str | None, remove: str | None
 ) -> None:
-    """crowd_stats 원자적 증분/보정 (Postgres UPDATE)."""
+    """crowd_stats 원자적 증분/보정 (Postgres UPDATE).
+
+    같은 outcome 재제출(add == remove)은 분포 변화가 없으므로 no-op.
+    이를 보정하지 않으면 팀 컬럼만 +1 되어 a+draw+b > total → 합 100% 초과.
+    """
+    if add == remove:  # 결과 변동 없음(스코어만 수정 등) → 분포 그대로
+        return
     values: dict = {}
     if add:
         col = _COL[add]
         values[col] = CrowdStats.__table__.c[col] + 1
         if not remove:  # 신규 제출이면 total +1
             values["total"] = CrowdStats.total + 1
-    if remove and remove != add:
+    if remove:
         col = _COL[remove]
         values[col] = CrowdStats.__table__.c[col] - 1
     if values:
diff --git a/frontend/src/components/Arena.tsx b/frontend/src/components/Arena.tsx
index 34b5104..7926ad1 100644
--- a/frontend/src/components/Arena.tsx
+++ b/frontend/src/components/Arena.tsx
@@ -542,10 +542,18 @@ export default function Arena({
           Crowd Pick{" "}
           <span className="text-[14px] text-[var(--ink-muted)]">{t.crowdSub}</span>
         </div>
+        {/* 비율은 분포 합 기준(=total 과 동일해야 정상) — 구 데이터 불일치 시에도 100% 이내로 표시 */}
         <div className="flex h-14 overflow-hidden rounded-2xl border border-[var(--line-d)]">
-          <CrowdSeg team={match.teamA} value={pct(crowd.teamAWin, crowd.total)} tone="a" />
-          <CrowdSeg value={pct(crowd.draw, crowd.total)} tone="draw" />
-          <CrowdSeg team={match.teamB} value={pct(crowd.teamBWin, crowd.total)} tone="b" />
+          {(() => {
+            const sum = crowd.teamAWin + crowd.draw + crowd.teamBWin;
+            return (
+              <>
+                <CrowdSeg team={match.teamA} value={pct(crowd.teamAWin, sum)} tone="a" />
+                <CrowdSeg value={pct(crowd.draw, sum)} tone="draw" />
+                <CrowdSeg team={match.teamB} value={pct(crowd.teamBWin, sum)} tone="b" />
+              </>
+            );
+          })()}
         </div>
         <div className="mt-1.5 text-right text-[11px] text-[var(--ink-muted)]">
           {t.joined(crowd.total.toLocaleString())}