User blog comment:Jenburton/Scratchpad is going away - here's why/@comment-1057510-20120322173850/@comment--20120322184809

Hi, you may need to clear your cache (Ctrl + F5) in order for the new JavaScript that should let you be able to save a the XML file to work.

As for why that page isn't showing up in the category, that's because categories on Wikia are case sensitive. Because it doesn't have the second "T" capitalized, it is not appearing in that category.