Timesplitters Future Perfect - Weird Glitch in Mansion Of Madness

This trick is one that I truly can't explain, but I'll post what happened anyway, and maybe someone can tell me what its cause is.

I was playing the second part of the mansion, what lies below, and when you see zombies and the scientist in the little glass rooms, there were two of both the scientist, and the zombie, which is quite strange.


If you read this and have seen this before, reply to this post.