A student pointed out that her final grade was at over 400%. I checked the grades, and they were all over the place, all because of the attendance. I have no idea what happened, but I finally had to mark the existing assignment as one that wouldn't factor into the final grade and then create a new attendance grade that has to be updated manually.
This morning, I checked the grades again, and the attendance had dropped to zero.
Help? I don't even know where to start on this one.