Thread:CarbonApt/@comment-26397550-20180209230842/@comment-4196050-20180210145402

Categories can be tricky. Category: Catalog items is a category used for categories. I'm personally more of a visual person, so I think the diagram might help to explain the use for the category (sorry for my sloppy handwriting :P ). Pretty much, Category: Catalog items is used as a main "parent" category for all categories associated with catalog items, such as Category:Limited items and Category:Catalog items by genre. Where things can get tricky is that some of those category pages can also be parent categories to other categories (such as Category:Catalog items by genre has categories like Category:Adventure items and Category:Comedy items).