To sign up for additional courses you have to register through the new system. When you purchase a new course you no longer have to register each time as the courses are all stored on a central profile that saves your information, purchases, and certificates.
Q: Some of the quizzes aren't accepting my answers, what's going on?
If a quiz isn't accepting your answers, keep moving forward through the course. Correcting your grade may take up to a day to complete. Be sure to check your course results (My Courses -> Completed Courses -> View Results) when you get done. If you see that something has not been corrected or if you need your certificate urgently, call the help desk to expedite the process.