Combat kings fall to the ground when you already have level 5 of that CK. He probably chose a starting pack that maxxed out a CK, and bought the SAME CK in chapter 1, so obviously it would fall to the ground. That is what he is describing. It doesn't mean anything to do with the bug. The bug seems to happen to whatever character has Berserk. CRVN92, what starting pack does Fradz have when he got that bug at the start of chapter 2?
Well here is something else, there could be a bug where CK's apply their effects anyway, even though you have level 5, and they fall to the ground AS WELL so can be used infinitely. That is possible maybe? So you could have greater than level 5 berserk.. I don't think so though.
Anyhow a lot of CKs don't work, magic torment burns WAY too low mana, syphon life doesn't do anything, trance doesn't increase magic damage, etc.