Ok... So about those bugs in 0.15...
It seems I can both add to my points for Rachel and save those points if they are scored Monday through Thursday. But if I try to go to the park on Friday, Saturday or Sunday, the day switches to Monday and if I score additional points from talking to her, they aren't saved. Also, that save will appear in the save menu as the correct day (Fri-Sun) but the day will be Monday once reloaded, so this is specific only to those three days and only if I go to the park. Other saves on those days are fine. It's the combination of those days and the park that screws up both time (day switch to Monday) and score (no points scored for Rachel are retained). Very strange.
I haven't experienced the bug of not being able to interact with Rachel. I also have not seen any bugs related to body parts. But I believe others who are reporting those bugs.