Scenario A. Method trap. Light categories look excellent; heavy exams drag. Points % flatters; weighted % tells the syllabus truth. Gap of several points = Weighted vs points in action.
Keep scores fixed. Raise Final weight 40 → 50 and lower Quizzes. Watch the method gap and contribution rails move without changing a single score.
Scenario B. Syllabus 100%. Clean weights. Methods may still differ slightly when item totals are unequal. Equal weights are not the same as equal points pools.
Scenario C. Overweight syllabus. Weights sum past 100. Renormalize + chaos chip: fix the sheet before arguing with the LMS.
Scenario D. Quiz illusion. Perfect tiny quizzes, weak midterm/essay. Points mode can look “okay” while weighted pull sits on the heavy rows. Study the rails, not the quiz streak.