WEIRD EXP PROBLEM... RM2K3

So....has anyone ever encountered an error where, while play testing, half the EXP disappears from the player characters, but their levels don't change?

I have no idea when this happened...but I was play testing HR and I noticed that I haven't been leveling up in a while. I looked at the EXP, and I had roughly HALF the EXP I was expecting (roughly 17000).

I checked an old save, from about 2 quests back, and all my chars had 24000+ EXP.

Any ideas?

...perhaps. Though I'd have to investigate to see if I actually changed anyones classes in that period of the game.