Sorry, had this posted in two different places, but forgot to post the resolution, here.

These 'phantom jobs' were evidently being held in cache. I stopped and restarted the SQL Server...

Thanks for that info. I stopped and restarted the Agent a while back and that resolved my problem as well. Sorry, I didn't respond to this earlier.

This answer seems incorrect. I believe 'None of the above' should be the answer.

Your answer is, "There could be at least one row in the Orders table that references...