Alerts sent content from category NOT selected

I'm having some issues here. It seems either the alerts do not get queued up and sent or it is sending content contained in categories that are not selected to be included. Todays went out sending 2 new posts in the faq (#17) category, this category is not currently selected. This category has been selected in the past but not for some time....
Why did this happen, can you show me where in the DB I can verify the categories that are going to be included??