Yes, the last page is the one they were talking about. It"s very hard and error prone to edit it back into individual pages. That page will eventually roll off though.
Somewhere in all those posts, there is one that didn"t finish correctly and it causes that. Finding it is like a needle in a haystack and after that, then the problem of editing would start.
As soon as it hits the max number of pages, it should trim off the extra.