Today a part of my students had a quiz. There were 19 students. After finishing the quiz I had 19 grades in the quiz grading report and only 10 in the grader report. All attempts have the status "Finished".
It is not such a big deal to grade 9 students manually, but this is 45%. In several days I will have a quiz with 100 students and later with 400.
I do not know exactly what Moodle version do I have (I'm just course manager), but I can find it, if important. I also have about 6 grade items for this topic, one being the quiz we are discussing about.