My first username around here is RaileysXerilyasRX. Then I changed a few months ago to Sky High. I bet RaileysXerilyasRX is my username in the Showdown because the old username keeps there. I dunno why it is unregistered. But, I'm present in online users list. :/
I was fine with Eleska (ritsu) earlier. I just dunno why with yours. :/