Thread:ThePK/@comment-23880286-20150502090026/@comment-23880286-20150502155910

I see Gem Fusions has been changed to Fusion Gems, but it still isn't right. The thing with writing it down like #category-Fusion  Gems# is that all pages in the category will automatically be included underneath it. This could be a good idea, but Opal, Sugilite, Alexandrite, Stevonnie, Malachite and Garnet are already mentioned separately in the Mediawiki:Wiki-navigation. Since they are also in the Fusion Gems category, they are displayed double. If you want to use that notation, you have to make sure it doesn't have any sub-things (don't know what to call them, hope you understand what I mean).

Another disadvantage of using that notation is that some things can be there that you don't want to be there, for example Trentonius's blog posts, that shouldn't be in the category in the first place to be honest. There can be examples of things that should definitely be in the category, but not in the navigation though. For this reason it's generally better to just use.