There are several pages which have (almost) the same name as a category, e.g. Plant and the category Plants. I have seen this in a bunch of Wikia wikis before. It makes the category page pretty useless for most purposes. In some wikis they put a "See Plant page for more information" link at the top of the category page which just means you have to click two links to get to the actual Plant page.
Category pages allow normal wiki content at the top. I suggest using this to merge these page pairs into single pages.
I also suggest removing unneccessary plurals from page names while we're at it. Example: The Plants category becomes Plant, Monsters becomes Monster.
Please comment whether you like / do not like these changes. Thanks.