Catsfive ID was set up before richmitchell ID was booted. That means he had concurrent multiple aliases. I would think that same person has had other IDs as well.
It's really interesting that it is the hypesters who have been exposed as the ones who have had concurrent mulitple aliases and not the so-called bashers (well, except Zack).
My favorite multiple alias user is DABOSS because now we can look back and see the clear evidence with the unique punctuation habit.
It shows people who once believed in him that he's been up to no good for quite a while.