It's a quirk of how categories work in MediaWiki. Some are artifacts we will be discarding, and some are a result of how categories from PmWiki translate in MediaWiki.
We will need to do a lot of cleanup, no doubt about that. In fact, by filling in the categories, I was able to identify all the Tropers Tales pages and got them deleted in one shot. There are some other categories with pages we may need to do the same for, and now that we have everything categorized, that will make the cleanup process much smoother.
Also, every trope page and work page has a category by design. That category would automatically apply to all subpages of the main page, so that is definitely intentional.
We will need to do a lot of cleanup, no doubt about that. In fact, by filling in the categories, I was able to identify all the Tropers Tales pages and got them deleted in one shot. There are some other categories with pages we may need to do the same for, and now that we have everything categorized, that will make the cleanup process much smoother.
Also, every trope page and work page has a category by design. That category would automatically apply to all subpages of the main page, so that is definitely intentional.