AEC Except Needed Immediately

I have a Joomla website running off of Joomla 1.5.23, JomSocial 2.2.2, Video Whisper and a bunch of other third party extensions. Upon registration, there are a few steps including Name, Username, Password Fields, the next page features JomSocial Profile Fields, then onto Avatar Upload. Once these steps are completed, the user is brought to the Confirmation page and then receives an e-mail. The problem we are currently faced with is, when signing up using a Username with no spaces (Example: DJUser) the signup works and the user is assigned to the proper usergroup. When a user signs up with a username with spaces (Example: DJ User) the signup goes through but on the Confirmation page, the username displays (DJUser instead of DJ User). Is AEC forcing no spaces between the usernames or is this an issue from Joomla/JomSocial? Will provide login details to the chosen programmer. Hopefully we are just missing some small detail. Thanks Brandon