I just graded an assignment. When I go back to the grade book view, the first student's assignment's score is there. All of the others still have the little rectangle piece of paper looking icon instead of a grade. But when I hover over each student's square for that assignment. Their score is there. But when I move my cursor off it turns right back to a piece of paper. No grades are hiding, it looks like everything is normal, but still, the grades do not show up. Any ideas?