I think I read a response to this issue from a Mod a few years ago. IIRC, there are posts the Mods have hidden from public view for whatever reason and they're pushed to the end of the thread, sometimes pages of them. Maybe offensive or outside the rules. The posts are on the threads, but we can't see them. I don't know why they keep them, maybe to build a case to ban offenders, but that's the explanation I remember.