A professor I support showed me this.
Three grades in an Assignment Category.
Two are out of 20, one is out of 25.
When Canvas calculates the grade for the Category, it gives the result as if all three grades had the same weight.
Does Canvas not know how to do a weighted average? It can't be adding the scores and dividing by 65 to get the percentage--because it's getting the wrong answer.
I was looking for information regarding the precision of assignment grade weights. My experience says Canvas doesn't allow alternative weights in an assignment group. In your case, just to get it to work and say the assignments are homework, I'd allocate 40% to a 20point HW group w/two assignments and 25% to a 25p HW group w/one assignment. Junks up the assignment page, but I haven't stumbled on any options to do it differently. My sort of analogous problem is having 3 quizzes in a group and have a group weight not divisible by three. Students ask what the actual weights are and benchmarking against a spreadsheet record is off a bit. What is the format of assignment weights in grade calculations
So Canvas assumes each Assignment in an Assignment Group are weighted equally? Since in my case, the instructor was using points, it would be trivial to add the points and THEN divide by the total possible points. Instead, Canvas seems to treat each grade as a percentage and then to average them (non-weighted). Is that your experience, @JamesBodurtha?
I use a weighted gradebook, and for my assignment groups it takes total points earned divided by total points possible to get a percentage that is then multiplied by the group weight. It is not taking percentages of the assignments and averaging them. I do not have a drop lowest or drop highest selected. You did not mention that directly, but from the information posted I would assume it is not (just threw that out there in case that has an affect on the way canvas treats grades).
Can you supply the actual numbers for what you are discussing?