When I click on any of the Non-Sequitur-Donkey's comics in his drop-down list of comics, it takes you to a User does not Exist page. I think what it's doing is only seeing the username as what's before the hyphen, since when you click anywhere in the drop-down list of D-Fenz's comics, it doesn't take you to a User does not Exist page, but instead to the user known as d's comic page.