Here is the deal. I use Gmail because I simply love it!
I have gmail set up so I can send emails in gmail for work [email protected]
Everytime I send an email in gmail and set it to send as my work email, its sent to my blackberry! I set up the filter to not forward when its sent from my gmail account and to not forward if its sent from my work email...
I would try deleting the filter in the BIS settings, and then recreating it by following the directions laid out to a T. If that doesn't work, check back.