Replication on the replicator tab skips first database

We recently upgraded our Domino server on the iSeries to 6.5.5, since doing so we have had a number of users who reported that the first database on their replicator tab is skipped when doing replication. If they move the database down on the tab, it then replicates that database, bus skips the new first database listed on the replication tab. Anybody seen this before, and if so do you have any idea on how to fix the problem?