[wpwren]

I might have read one of your explanations as being similar to that issue. I'd still lean towards a filter and possibly for your school email. You could set up a test email box or two actually separate from school and test between them and see if it still happens. If you can access your BIS then set them up there so they'll come to your BB as part of the test etc.

I would suspect your school email as needing the filter, that what it sounds like anyway the more I read your notes here.