There is a serious problem in BENT up to 10d (I don't know if this problem still exists in 11d) where you can easily corrupt your database:
NEVER EVER change a Selection List, or Policy if the Jobs are in not in the "scheduled" state.
We had this problems at 3 customers locations.
To fix this problem, you have to either
- Reinstall a clean, empty database (see Knowledgebase) and setup everything again
- Send in your MSDE Database (mdf and ldf file) so they can remove the corrupted entries.
This can only be done by the Engineering Support Team in USA, as far as I can tell.