User blog:InspiredAndNatural/Is This a Glitch?

If not, it's a nice way of making sure that Kathrin-Maria Samrra Stehle doesn't cheat on adding categories in sections whereas the overall page already has those categories. I'm asking, because I deleted the categories in a section, but when I re-add it to the entire page, I go to the Edit page of the Trivia section and it's there once again. If this isn't a glitch, and there for a purpose, it's very much appreciated.