Using Novell 5.1 Sp 9 and GroupWise 6.5.4

I have set up three BalckBerry Accounts - all working on POP3 and all
downloading the emails. Trouble is that the emails are repeatedly being
downloaded, whether deleted or not and whether the INternet Account for
each ownner of the client sets autoaging or not.

What have I set incorrectly?

Any help would be most appreciated