item count mismatch when backing up a bucket using cbbackupmgr

When backing up a bucket using cbbackupmgr, there is a mismatch between the number of documents in the bucket in the cluster administrator, vs. the output of the cbbackupmgr command.  Please see the attached screenshot (itemCountMisMatch.png) which shows the mismatch.  I am guessing this is because deleted documents are counted. There are a few other bugs (MB-21924 , MB-21962) that may be related.

Replication procedure:

1.  Create a backup of a bucket which has experienced a number of mutations.  Would suggest having at least 1MM documents.
2. Run cbbackupmgr, and note the difference between the number of documents reported by the cluster admin, and the number of documents in the output of the cbbackupmgr command.

Please let me know if you need additional information.