1 serving of sugar free jello is 10 calories thus 1 serving is 0 points; 2 servings of sugar free jello is 20 calories and still falls as 0 points; 3 servings is 30 calories and falls as 1 point; 4 servings (the whole box) is 40 calroies and falls as 1 point. Make sense now?
If you pick up the WW Food Companion it lists points for a tons of different foods (and brand name items) - it really is a worthwile investent. I tuck mine in my purse or briefcase for a handy reference.