I wish I had time to look into this more thoroughly but I'm swamped today.  Also, most of the analytics team will be in Zurich starting Monday and we'll only be back after May 12th.

The best advice I can offer is to compare data from the two databases for the graphs where you see discrepancies.  It's possible that replication lag / problems are still happening.  Please report any bugs in bugzilla under the EventLogging component.