Pappy,
see the notes in the instructions starting on line 14.
When you delete a post, it does get deleted from the main w3t_Posts table as usual, but not from the new "Events" table. The idea is that unless you're deleting hundreds of events, I judged that the tradeoff between modifying an additional script and just leaving a few "dead" entries in the Events database wasn't worth it.
Having said that, see the "Additional note" in the instructions starting on line 30 - if you really want to delete entries in the Events database, you could adapt/update from
this old thread Regards,
Max