Justin Vines's dashboard

I changed my username yesterday. Today, it's still set as my old username and all of my @ replies are being directed to my old username, and even though my old username still appears on my twitter page, all of the @ replies won't show up unless they manually type in my new username.... and the only way I can go to my twitter page is by manually typing my new username into the address bar. Just a few minutes ago I changed my username back to my old username and it (worked????!!!?) and then I tried changing it back to my new username again. But it says it's taken...... ??????? Yet it's still screwing up like it has been since yesterday...... I'm getting really frustrated and I wish this problem would be fixed.. now.