Automated Unsubscribe

I'm trying to make sense of this automated unsubscribe, so that I can hopefully get it to actually work for us. I have the unsubscribe email setup, but I rarely check it because there is never anything in it. Recently, we started sending out some emails from the forum "Email Users" and I started seeing a few emails accumulate in this inbox. I didn't think much about it until I noticed duplicates after sending out a few emails over a few weeks time. I decided to check the user, and none of...