Mark,
I was having problems and Gem suggested that I clear my cookies, cache, and browsing history. I always do this on my computer, but had not done it for my browser. If your on Chrome, try clearing those out and do it for your computer as well.
It also sounds like you may be on one of MW screwed up servers. For that, I can't help...I'm in the same boat.
As far as your avatar not saying the right name in here, go to the top of your screen, hit the profile button, and change your name.
Hope this helps.