Hi again, @CHEGGER ...
Yeah...looks like you are using a current Classic Quiz instead of a New Quiz. I just logged in to a sandbox course I have where I can try out New Quizzes, and New Quizzes uses an External Tool similar to this screenshot:

Since you are using Classic Quizzes, Canvas should be automatically calculating the quiz total for you so that you don't have to populate that point total on your own. One other thought I just had...do you, by chance, have a rubric attached to the Classic Quiz? How do I add a rubric to a quiz? - Canvas Community It's possible to attach a rubric to a Classic Quiz and have that rubric be a completely different point total than the total points of the quiz questions. So, you might want to check that as well.
Beyond those things, I think it's probably best that you reach out to Canvas Support to see if they can log into your course with you to take a look at things. How do I get help with Canvas as an instructor? - Canvas Community If you end up chatting with them, please come back to this topic to provide an update for us...thanks.
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