We are running Moodle 3.3 but I suspect our Marking manager isn't set up correctly. On one course, the manager always returns a count of 1 attempt to be marked per question. When I click on the question, invariably there will be a list of some students who have probably started the question, but not actually submitted it for marking. Unfortunately, the system seems to count this as a question to be graded.
On another course, there's an under-count in the manager. It indicates 2 to be graded, but when you click on the question there could be 3 or 4.
Maybe this isn't a glitch with the manager but rather something we have done incorrectly in setting up the quizzes?