I disagree. Hammering on things you already know, even with a few mistakes, becomes counter-productive. I mean, surely you are not suggesting that the student is going to know EVERYTHING there is by the conclusion of each section?! Even if he successfully - finally- gets every single answer correct?!
But let's move on, shall we? and let someone answer the next question I posed, which was: if I did as Jkoy suggested and just "moved on" when I had had enough of one particular section, the site will not register that section as "complete" and therefore I would have to keep track, at least mentally, of what I'd done, because there would be no record of it otherwise. I don't care a fig about winning any prizes, I just wanted a way to monitor my progress - which with the current format, seems impossible (it doesn't give credit for right answers, if the total points are not met).