Swapping Places in Vehicle kills npc

Windows XP on ASUS Eee minilaptop

So I went to go get in my first working car and one of the npc’s jumped in the drivers seat. I was like "ok. i’ll just swap seats with her. I was sitting in the front seat, passanger seat. the car was facing west. I have 4 npc’s. So I push south and the menu pops up “what do you want to do with this npc?” I choose “Swap positions” and an error pops up. its an theirs no position avalible for this npc. this npc’s head explodes.


Oh my.

Can’t reproduce, need more details.

I’ve tried to recreate this using 6 npc’s it has not reoccured.