Scenario A — Method trap. Light categories look excellent; heavy exams drag. Points % flatters; weighted % tells the syllabus truth. Gap of several points = Weighted ≠ 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.