I am not an expert on quizzes. Perhaps you had something different in the setting "Question behavior, how questions behave."
But if you do not know which settings are different, how are we to know? It might be better to explore which settings are different by opening two browsers, side-by-side, and to review which settings are different between these two quizzes. Then, you might be able to refine your posts and ask "Why does this setting do this?"
But if you do not know which settings are different, how are we to know? It might be better to explore which settings are different by opening two browsers, side-by-side, and to review which settings are different between these two quizzes. Then, you might be able to refine your posts and ask "Why does this setting do this?"