Thank you for your help. My username is my forum name ... which is what I would expect my game name to be as well. However it seems there is another nickname tied to my stardock account which is the same as my email, and that I can not find anywhere, or how to change it but Demigod beta likes to use it.
It also seems to only affect some users but not all of them. A new version if beta is supposed to be released soon, maybe that will sort it out.
It seems funny that everyone says you can change it though Impulse ... but I have looked at every Impulse option I can find and can't change it.