I had problems with the Next button - my users were selecting an answer, and clicking Next instead of Submit resulting in no questions actually being answered.
You are right about the terminology. To me, the questions at the end of each section are to "review" that the learner understood the content of that section, and not the standard captivate terminology to "review" the answers to the quiz.
I managed to solve my problem with user variables and advanced actions.
Thanks for the link to the "Buttons on question slides" tutorial. This was very useful. I had some of the problems described there, and it helped a lot.
Steve