diff --git a/src/dexorder/memcache/memcache_state.py b/src/dexorder/memcache/memcache_state.py
index 7b42bdd..5f4b66d 100644
--- a/src/dexorder/memcache/memcache_state.py
+++ b/src/dexorder/memcache/memcache_state.py
@@ -30,8 +30,7 @@ class RedisState (SeriesCollection):
     async def clear(self):
         log.debug('clearing memcache')
         r = current_redis.get()
-        result = await r.delete(*[f'{current_chain.get().chain_id}|{k}' for k in ['latest_block', *self.datas.keys()]])
-        print(result)
+        await r.delete(*[f'{current_chain.get().chain_id}|{k}' for k in ['latest_block', *self.datas.keys()]])
 
 
     async def init(self, state: BlockState):
diff --git a/src/dexorder/order/orderstate.py b/src/dexorder/order/orderstate.py
index a94a795..146c87e 100644
--- a/src/dexorder/order/orderstate.py
+++ b/src/dexorder/order/orderstate.py
@@ -87,6 +87,7 @@ class Order:
             Order.vault_open_orders.listappend(key.vault, key.order_index)
             # Start with a filled value of 0 even if the chain says otherwise, because we will process the fill events later and add them in
             tranche_filled = [Filled(0,0) for _ in range(len(status.trancheFilledIn))]
+            order_log.debug(f'initialized order_filled[{key}]')
             Order.order_filled[key] = OrderFilled(Filled(0,0), tranche_filled)
         order_log.debug(f'order created {key}')
         return order
@@ -156,13 +157,16 @@ class Order:
 
     def add_fill(self, tranche_index: int, filled_in: int, filled_out: int):
         order_log.debug(f'tranche fill {self.key}|{tranche_index} in:{filled_in} out:{filled_out}')
-        old = Order.order_filled[self.key]
+        try:
+            old = Order.order_filled[self.key]
+        except KeyError:
+            raise
         new = copy.deepcopy(old)
         new.filled.filled_in += filled_in
         new.filled.filled_out += filled_out
         new.tranche_filled[tranche_index].filled_in += filled_in
         new.tranche_filled[tranche_index].filled_out += filled_out
-        order_log.debug(f'post-fill order: {new}')
+        order_log.debug(f'updated order_filled: {new}')
         Order.order_filled[self.key] = new
 
 
@@ -176,6 +180,7 @@ class Order:
             Order.vault_open_orders.listremove(self.key.vault, self.key.order_index)
             # set final fill values in the status
             of = Order.order_filled[self.key]
+            order_log.debug(f'deleting order_filled[{self.key}]')
             del Order.order_filled[self.key]
             status.filledIn = of.filled.filled_in
             status.filledOut = of.filled.filled_out
@@ -203,6 +208,7 @@ class Order:
 
     @staticmethod
     def pub_order_fills(_s, k, v):
+        log.debug(f'pub_order_fills {k} {v}')
         # publish status updates (on placing and completion) to web clients
         if v is DELETE:
             return None
diff --git a/src/dexorder/runner.py b/src/dexorder/runner.py
index 2a48a8a..30f87fd 100644
--- a/src/dexorder/runner.py
+++ b/src/dexorder/runner.py
@@ -255,7 +255,11 @@ class BlockStateRunner(BlockProgressor):
 
 
     async def handle_head(self, chain, block, w3):
+        # todo refactor this to generate a fork from the latest block back to whatever ancestor it can find
         log.debug(f'handle_head {block.height} {hexstr(block.hash)}')
+        if self.state and block.height <= self.state.root_block.height:
+            log.debug(f'ignoring old head')
+            return
         session = None
         batches = []
         pubs = []
@@ -324,7 +328,7 @@ class BlockStateRunner(BlockProgressor):
 
                 # check for root promotion
                 confirm_offset = (config.confirms if config.confirms is not None else chain.confirms) - 1
-                promotion_height = latest_block.get().height - confirm_offset
+                promotion_height = latest_block.get().height - confirm_offset # todo latest_block should not be a ContextVar but a global dict by chain_id
                 new_root_fork = None
                 if fork.disjoint:
                     fork: DisjointFork
diff --git a/src/dexorder/walker.py b/src/dexorder/walker.py
index 07078f2..42a3aa6 100644
--- a/src/dexorder/walker.py
+++ b/src/dexorder/walker.py
@@ -124,7 +124,7 @@ class BlockWalker (BlockProgressor):
 
 
     async def handle(self, from_height, to_height, *, chain=None, w3=None):
-        log.info(f'processing blocks {from_height} - {to_height}')
+        log.info(f'processing blocks {from_height} through {to_height}')
         if chain is None:
             chain = current_chain.get()
         if w3 is None: