diff --git a/chainsyncer/backend/sql.py b/chainsyncer/backend/sql.py
index 4eaaf9b..bf6ed13 100644
--- a/chainsyncer/backend/sql.py
+++ b/chainsyncer/backend/sql.py
@@ -11,7 +11,7 @@ from chainsyncer.db.models.filter import BlockchainSyncFilter
 from chainsyncer.db.models.base import SessionBase
 from .base import Backend
 
-logg = logging.getLogger().getChild(__name__)
+logg = logging.getLogger(__name__)
 
 
 class SQLBackend(Backend):
@@ -267,7 +267,8 @@ class SQLBackend(Backend):
             session.flush()
 
             #if block_height != block_resume:
-            if highest_unsynced_block < block_resume: 
+            logg.info('last live id {} {} {}'.format(last_live_id, highest_unsynced_block, block_resume))
+            if highest_unsynced_block <= block_resume: 
 
                 q = session.query(BlockchainSyncFilter)
                 q = q.filter(BlockchainSyncFilter.chain_sync_id==last_live_id)
diff --git a/chainsyncer/driver/poll.py b/chainsyncer/driver/poll.py
index cb7c790..859925c 100644
--- a/chainsyncer/driver/poll.py
+++ b/chainsyncer/driver/poll.py
@@ -65,6 +65,12 @@ class BlockPollSyncer(Syncer):
         :returns: See chainsyncer.backend.base.Backend.get
         """
         (pair, fltr) = self.backend.get()
+        (target, fltr_target) = self.backend.target()
+        if target == pair[0]:
+            logg.info('syncer was done before it started: {}'.format(self))
+            raise SyncDone(target)
+            
+
         start_tx = pair[1]