Been getting class change penalties in a leve without changing classes :(

[Claire_Pendragon]

I'm level 40, and was doing a level 30 leve +9.

Does it still happen to you?

Didnt read the thread in full yet, but yes.
Doing Lv30 leves as a Lv40, no matter how many stars you make it, will lower your exp reward. (As stupid as it is, raising the stars should give MORE not less.)