Warlock Invocations bug. (Shadow Demons)

[Groburn]

There's a bug with a new warlock invocation (Summon Shadow Demons). The invocation summons 0-3 shadow demons but it seems like they are considered as dominated PCs instead of summons/companions and thus they reduce exp gained from killing mobs. Also my warlock is lvl 24 and the demons are lvl 14 and the exp penalty is about 30-40%. From a naga without the demons my PC gets 21exp per kill , with the demons he gets about 15exp per kill.
Also the spell seems to shift the alignment of PC towards evil. It's random but it does shift it when cast.