I am teaching a course using Canvas. I recently added quiz completion requirements in a module. I am requiring the students to take 5 quizzes which I assumed upon completion, there would be a green checkmark next to the submitted quiz. I tried to take the quizzes in student view to see if it worked, but only one of the 5 quizzes showed a green checkmark despite my having done all 5 quizzes. What could be the problem?