EVERYBODY LISTEN! I had this same exact problem for almost a month but when I did my research, I found the solution. This is what you need to do:
1. On the top right corner, click the Account tab.
2. Look a little bit down at the options and click Application Settings.
3. On ALL of the quizes you've taken and ALL of the application boxes in your profile (Like, Truth Box, or Sketch me.), YOU MUST DELETE EVERY SINGLE UNWANTED AND USELESS APPLICATIONS BY CLICKING THE SMALL X ON THE RIGHT SIDE OF THE APPS. It may take a bit of time though if you had a lot like me!
4. Wait about, 2 days. It worked like a charm for me!
Hope this helped!
PS: If this doesn't help, don't waste your time contacting the Admins. They hardly ever reply. Try clearing your temporary files, history, cookies, saved passwords, and web form information. That might help!