@Glitch said:
notcategory=UncategorizedPages
"UncategorizedPages" is the page Special:UncategorizedPages, and the category is created by DPL as a way to list matched pages with no category.
I believe all "Special:" pages are created on the fly, and therefore trying "notlinksfrom" and "notlinksto" aren't working.
I can also make sure all help pages not intended to be listed have a special category ([[Category:Nohelpindex]], perhaps), but all coders are lazy and work very hard to stay that way.