Student took a locked quiz. How?

[erica_wagner]

This is a first. I have my chapter quizzes set up for the entire semester, set to unlock on specific dates. My first class hasn't even met yet for the semester, and I just published the course.

A student has managed to take the first quiz, even though it won't unlock until tomorrow. I've double and triple checked, and it's not available until tomorrow. I tried logging in as a student, and it shows as locked. But a student took it yesterday and has a score.

How did they do this? How can I make sure a locked quiz is really locked for all students?