wtf is this, and why are massive amounts of pages linked to this, without it appearing here. Even more strange, on the edit page, the category isn't visible, and I just made a page myself, and the category is there without me adding it...
EDIT: I think I found where it is coming from...
the "placeholder" file (link) If you go out of the editor you normally go to when clicking a red link (click the name of the file you are about the edit) you will see a list of pages using the placeholder file.
all of those pages have this category.
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