Got a new NON-DVR box and someone else's scheduled recordings?

On Friday I swapped out one of my NON-DVR boxes.  I brought the new one home, hooked it up, and everything was fine.  A few hours later I was looking through my scheduled recordings and a ton of wrestling shows showed up that I hadn't scheduled.  Why would a NON-DVR box be connected to someone else's scheduled recordings?  Better yet, why did these even show up in the first place?  Doesn't xfinity wipe boxes before they give them back out?