Regarding the stats, what were they before, and how many areas did you clear before starting the Kindergarten?
I think I know what happened: When I first released the Kindergarten, I had to update existing saves to initialize the door slot variables to blanks. I thought that wouldn't trigger for anyone coming in later, but it looks like it did. (Is this the first time you've reloaded a save?) If that's the case, it shouldn't be too hard to fix; I'll just have to make another save update.
Edit: Actually, if that was the case, the treasures in the Kindergarten should all reset too. Is that the case?