replica items count mismatch on source cluster

http://qa.hq.northscale.net/job/ubuntu_x64--01_02--rebalanceXDCR-P0/17/consoleFull

[Test]
./testrunner i ubuntu_x6401_02-rebalanceXDCR-P0.ini get-cbcollect-info=True,get-logs=False,stop-on-failure=False,get-coredumps=True -t xdcr.rebalanceXDCR.Rebalance.async_rebalance_in,items=100000,rdirection=bidirection,ctopology=chain,doc-ops=update-delete,doc-ops-dest=update-delete,expires=60,rebalance=destination,num_rebalance=1,GROUP=P1

[Test Error]
[2014-06-23 11:46:00,302] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket
[2014-06-23 11:46:05,339] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket
[2014-06-23 11:46:10,379] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket
[2014-06-23 11:46:15,433] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket
[2014-06-23 11:46:20,463] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket
[2014-06-23 11:46:25,498] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket
[2014-06-23 11:46:31,528] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket
[2014-06-23 11:46:36,566] - [task:440] WARNING - Not Ready: vb_replica_curr_items 80001 == 80000 expected on '10.3.3.146:8091''10.3.3.144:8091''10.3.3.147:8091', default bucket

[Test Steps]
1. Setup 3-3 node Src and Dest cluster.
2. Setup CAPI mode replication between default bucket.
3. Load 1M items on each cluster.
4. Add one node on Destination cluster.
5. Perform 30-30% update and delete on each cluster. Update items with expiration time of 60 seconds.
6. Wait for expiration time of 60 seconds.
8. Expecting 80000 items on each side.
9. 1 replica item on Source side was extra.

I ran this test twice on the same cluster, but couldn't reproduce solely. Please see if you find anything suspected from the logs.