It's me again! :)
I just got a strange error message:

When starting a battle I got the message that my team was over the mana cap of 20, however, Selenia Sky, Silvershield Paladin, Angel Of Light and Gold Dragon, which I wanted to use, have exactly a mana sum of 20 together.

Edit: it seems there are some problems at the moment: I had a Silvershield Paladin at max level, but now it has fallen back to level 3! I wonder what happened?