It is believable, especially if out of state. Some states let you start dual stuff (dual enrollment, dual credit, PSEO, early start, etc.) as early as sixth grade. In some cases you could take 10 or more classes each year. This can be nearly twice the credits needed for a bachelor's degree. The classes can be on-campus at a research university.

I got enough credits for a bachelor's degree. Many of the classes were on-campus at a research university. I already did more math and lab science than an engineering degree requires. All I'm missing is the junior-level and senior-level classes in the major, which is computer science. ETAM demands wasting a year and gambling on my future.

I guess I won't commit to the school. They clearly hate advanced students who have already completed the beginner classes.