Comment 3 for bug 1315342

Yes, the comments compound, if I recall correctly.

IDK why you don't just edit the text files (/etc/apt/sources.list, and /etc/apt/sources.list.d/*.list) with an editor, esp. if the GUI sucks.

 It's pretty common practice for tools that mess with your config files to leave extra comments showing what they did.

 They're only useless if you're re-enabling stuff right away after an upgrade, when you still remember what happened. If you had forgotten that you had something from a PPA, and think of it months after an upgrade, it might be a useful reminder to see that you used to have a PPA enabled, but now you don't.