: Fwiw, I've always thought the name "Defaultsort" is a gross misnomer, unless my understanding of the word "default" is incorrect.  The truth is that the default sorting key is the article's title.  Specifying something different from that default is done by something called "Defaultsort"; shouldn't it be called anything other than "Default"?  I know this confuses many people, since I've come across multitudes of Defaultsorts that are identical with their articles' titles.  Such a waste of time and space.   

 : Btw, see Wikipedia:Categorization#Sort keys.