It is natural to try to see patterns in the moderation, but I think the largest pattern is that there is little pattern. They instead have an job that is impossible to do at the scale they do it at the budget they do it at. They therefore make a lot of mistakes. They hate to admit these mistakes so they are constantly trying to defend the indefensible rather than admit that there is no way to have a uniform moderation policy that works on the hundreds of hours of video that are uploaded every minute.