1 unanswered question?

ON quizzes, it says I haven't answered just 1 answers...yet Ive checked everything and I have answered each one. I looked on the leader bored and im like number 5 or so cuz i only have 8 right when there are 9 questions, but I don't see one anywhere. I click "Unanswered" and it says Ive answered all of them. Ive checked to see also if Ive gotten anything wrong. I got each q right..so i don't know whats going on...?