Oh ok. Well if that’s the question, I think it’s a minor issue. If they want more of a challenge, they could raise the number of lessons from 5 to 10 or something.
That wouldn’t affect the quiz, though, since the quiz always happens after every five lessons. (I.e., if you do 20 lessons, you still end up taking a quiz every 5 lessons, for a total of 4 quizzes.)
Personally, I haven’t had any trouble with the “right-away” thing, but I understand the desire. I think, in the long run, it makes little difference. But, that said, I’d also like it if that quiz was guaranteed not to start with the last item in the five-item list. (I say five-item list, but it can be smaller, when lessons aren’t a multiple of five.)