Why such a difference between cameras?

Hello! Newbie here. I've invested into 5 cameras but have a few questions. Why can't all cameras have snapshot capture. My cheap indoor cam and my spotlight cam do, my two expensive outdoor stick up cameras do not. My cheap indoor cam can run inverted video. My two expensive stick up cams cannot. None of this makes sense to me. Not only does this complicate setup, it makes me wonder if I made the right purchases.