Stretch Panic/Fridge

Fridge Logic

 * There are clearly three types of models for the sisters before they get transformed (Young, Tall and Fat, respectively), and four variations for each. But they're all done completely randomly. Is there really anything to this, or did the creators simply didn't think it would be that important? Or furthermore, are they suggesting Linda's sisters might end up in the wrong bodies if you don't do it right. And will there ever be someone who is able to look into the game enough to confirm or deny this, for that matter?