Like GertjanA, I'm having trouble figuring out your question, but I'll take a stab at it, because if I'm reading it right it's an issue I've seen before.
If your Blackberry server is configured to send new messages to Blackberries, when emails are archived the Blackberry server may be interpreting the shortcuts as new messages and re-sending them. In order to stop this from happening, you'll need to configure the Blackberry server to skip messages with a message class of
IPM.Note.EnterpriseVault.Shortcut.
Right now, Enterprise Vault doesn't support mobile devices (see:
http://seer.entsupport.symantec.com/docs/281585.htm) so this sort of behavior isn't surprising, since EV doesn't have a way to know whether a user is using Outlook or a Blackberry.