Antecedent: Teacher is reusing quizzes from previous years or terms. They copy the quiz to their class when the new term starts. When the quiz is coming up, they go into the quiz and add or remove a few questions which changes the total number of points. Then the students take the quiz. 

Problem Behavior: The grades that are showing the Grades tab are calculating incorrectly.

Scenario: Teacher had a unit test made with 79 total points copied into into his class. The night before administering the test, the teacher added several questions and changed the total score to 95 points. The students took the test the next day. In the Moderate tab within the test, all scores calculate properly. In the Grades tab in Canvas, none of the scores calculates properly. They all tabulate in a strange way (explained below) that uses the original total score of 79. 

Example: (image attached)

Student 1 scored a 77 out of 95 on the test, which correctly tabulates to an 81.05% in the moderate tab. In the Grades area, the percentage score is incorrectly calculated as a 67.4%.

What seems to be is happening is the grades score is taking the percentage from the Moderate tab and then applying it to the original total. 81.05% x 79 = 64.02. This would be the number of points earned if the score had been out of 79. 

THEN -- and this is the real headscratcher -- it takes that number of points it calculated and puts it OVER THE NEW SCORE. 64.02 / 95 = 67.4%. That's the grade that gets reported out in the grades tab.

Why is this happening and how do we avoid it? Do the teachers need to duplicate the quiz before making changes? After making changes? This has caused a problem for several teachers and probably more who may not have noticed. The Grades tab is what gets passed back to our SIS, and if it's wrong and teachers don't notice until the scores are already sent, that will cause an even bigger headache. Please fix this calculation problem, and in the meantime, tell us how to avoid it.