Because you used the cheat codes.

The fatty waiting around to be banged is in the "The Hare And The Mare". It's one of the bungalos in the fantasy area.

Seems like their staff is concentrating on getting out the mod kits at the moment. Maybe once those are out, BC will get some developer time to chase down and eliminate some of the bugs.

I've seen the "girl having sex but not visibile" problem. What I've found is that she's actually located somewhere else in the fantasy room. After some time, the game gets confused. What works for me...