Groundhog's Day is a glitch in the 13th floor's Matrix

I just recently watched The Thirteenth Floor, I've meant to for awhile as I've heard it's pretty good, it is. As all good Sci-Fi this one got me thinking of a lot of things. On that's been on my head, and why I'm necroing this old blog to post it is because it connects to my presentation topic for this class, Ground Hog's Day. I'll drop this here, since I'm sure I'm going to Spoil the movie and I'm not sure when it's going to happen. Also the things I'm going to talk about will make more sense if you've seem the movie. So,
--Spoilers--
That out of the way some further background. I now work as a Technical Service Consultant and do a good amount of database maintenance and administration. Backups are important. They don't go into a lot of detail of how the simulation world work but as a computer system have to assume that they have backups or redundant systems. Going off the theory that they can make backups one would think that if something were to happen to a particular entity in the simulation that they could be, resurrected?, via backup restoration. They would lose all memory of anything from the backup forward. Now this has a lot of implications that are fun to think about, but the one I'm going for here is, what if one entity did not reset when a system-wide restore took place, say, to the beginning of the previous day? Ground Hog's day took place in a restore-looped simulation world wherein everything save for Phil's mind got restored everyday to how it was at 6:00am February 2nd.