diff --git a/uspv/eight333.go b/uspv/eight333.go
index 22f582e4a..5c2e459d1 100644
--- a/uspv/eight333.go
+++ b/uspv/eight333.go
@@ -368,7 +368,7 @@ func (s *SPVCon) AskForMerkBlocks(current, last int32) error {
 	var hdr wire.BlockHeader
 	// if last is 0, that means go as far as we can
 	if last == 0 {
-		n, err := s.headerFile.Seek(-80, os.SEEK_END)
+		n, err := s.headerFile.Seek(0, os.SEEK_END)
 		if err != nil {
 			return err
 		}
@@ -392,8 +392,8 @@ func (s *SPVCon) AskForMerkBlocks(current, last int32) error {
 	}
 	// loop through all heights where we want merkleblocks.
 	for current < last {
-		// check if we need to update filter... every 5 new inputs...?
-		if track+4 < len(s.TS.Utxos) {
+		// check if we need to update filter... diff of 5 utxos...?
+		if track < len(s.TS.Utxos)-4 || track > len(s.TS.Utxos)+4 {
 			track = len(s.TS.Utxos)
 			filt, err := s.TS.GimmeFilter()
 			if err != nil {
diff --git a/uspv/txstore.go b/uspv/txstore.go
index 23c4b35ce..c9aaa6569 100644
--- a/uspv/txstore.go
+++ b/uspv/txstore.go
@@ -140,11 +140,15 @@ func (t *TxStore) AbsorbTx(tx *wire.MsgTx, height int32) error {
 				newop.Hash = tx.TxSha()
 				newop.Index = uint32(i)
 				newu.Op = newop
-				err := newu.SaveToDB(t.StateDB)
+				dupe, err := newu.SaveToDB(t.StateDB)
 				if err != nil {
 					return err
 				}
-				t.Utxos = append(t.Utxos, newu)
+				if !dupe { // only save to DB if new txid
+					t.Utxos = append(t.Utxos, newu)
+				} else {
+					fmt.Printf("...dupe ")
+				}
 				break
 			}
 		}
diff --git a/uspv/utxodb.go b/uspv/utxodb.go
index 68da11b39..4e701cfc8 100644
--- a/uspv/utxodb.go
+++ b/uspv/utxodb.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btcutil"
+	"github.com/btcsuite/btcutil/hdkeychain"
 
 	"github.com/boltdb/bolt"
 )
@@ -50,7 +51,7 @@ func (ts *TxStore) NewAdr() (*btcutil.AddressPubKeyHash, error) {
 		return nil, fmt.Errorf("nil param")
 	}
 	n := uint32(len(ts.Adrs))
-	priv, err := ts.rootPrivKey.Child(n) // + hdkeychain.HardenedKeyStart)
+	priv, err := ts.rootPrivKey.Child(n + hdkeychain.HardenedKeyStart)
 	if err != nil {
 		return nil, err
 	}
@@ -84,7 +85,7 @@ func (ts *TxStore) NewAdr() (*btcutil.AddressPubKeyHash, error) {
 func (ts *TxStore) PopulateAdrs(lastKey uint32) error {
 	for k := uint32(0); k < lastKey; k++ {
 
-		priv, err := ts.rootPrivKey.Child(k) // + hdkeychain.HardenedKeyStart)
+		priv, err := ts.rootPrivKey.Child(k + hdkeychain.HardenedKeyStart)
 		if err != nil {
 			return err
 		}
@@ -99,16 +100,26 @@ func (ts *TxStore) PopulateAdrs(lastKey uint32) error {
 	return nil
 }
 
-func (u *Utxo) SaveToDB(dbx *bolt.DB) error {
-	return dbx.Update(func(tx *bolt.Tx) error {
+// SaveToDB write a utxo to disk, and returns true if it's a dupe
+func (u *Utxo) SaveToDB(dbx *bolt.DB) (bool, error) {
+	var dupe bool
+	err := dbx.Update(func(tx *bolt.Tx) error {
 		duf := tx.Bucket(BKTUtxos)
 		b, err := u.ToBytes()
 		if err != nil {
 			return err
 		}
+		if duf.Get(b[:36]) != nil { // already have tx
+			dupe = true
+			return nil
+		}
 		// key : val is txid:everything else
 		return duf.Put(b[:36], b[36:])
 	})
+	if err != nil {
+		return false, err
+	}
+	return dupe, nil
 }
 
 func (ts *TxStore) MarkSpent(op *wire.OutPoint, h int32, stx *wire.MsgTx) error {