Do you guys have monetize turned on? - Youtube normally seeks it out and going with the guidelines. It's alright, even Youtube doesn't even follow their own guidelines which is mildly ironic. Reaction videos for example (I watch them) is actually against the Youtube community guidelines but yet Youtube doesn't do anything about it. Course, not complaining since I enjoy watching reaction videos but I just find that one particularly funny. There are lots of reaction videos that take other people's videos without permission and react to them which is pretty much no different than absorbing other videos and uploading them in a channel. Music videos etc.
On topic of course, if it's not the videos being monetized for DOAX then it might be the matter of having your channel not backed up by a 3rd partnership (Curse Network, Freedom! etc.) - Believe it or not, this is a thing. Not kidding. I remember reading a twitter post where someone asked on how this guy uploaded the naked scenes in The Witcher III. The guy mentioned that previously he had a strike for it but he partnered with a network, edited the video genre as "Education" instead of gaming, and turned off monetize. The videos are still there for Witcher III.
If someone uploaded any nude scenes on Youtube, he had to have done a setting change for it and network partnered, or Youtube actually let that one slide ironically. Hope you guys get that worked out since I don't defend Youtube for some of their community guides either. Some moments they are being truly fair, some moments does make people question them.