diff --git a/storage/miner.go b/storage/miner.go
index ef8045231..2f10da05c 100644
--- a/storage/miner.go
+++ b/storage/miner.go
@@ -24,7 +24,7 @@ import (
 
 var log = logging.Logger("storageminer")
 
-const PoStConfidence = 1
+const PoStConfidence = 3
 
 type Miner struct {
 	api    storageMinerApi
diff --git a/storage/post.go b/storage/post.go
index ea6521210..819f2d9da 100644
--- a/storage/post.go
+++ b/storage/post.go
@@ -99,11 +99,12 @@ func (m *Miner) scheduleNextPost(ppe uint64) {
 func (m *Miner) computePost(ppe uint64) func(ts *types.TipSet, curH uint64) error {
 	called := 0
 	return func(ts *types.TipSet, curH uint64) error {
-		if called > 0 {
-			log.Errorw("BUG: computePost callback called again", "ppe", ppe,
-				"height", ts.Height(), "curH", curH, "called", called)
-		}
 		called++
+		if called > 1 {
+			log.Errorw("BUG: computePost callback called again", "ppe", ppe,
+				"height", ts.Height(), "curH", curH, "called", called-1)
+			return nil
+		}
 
 		ctx := context.TODO()