Please, correct me if I'm wrong:
using one coupon for multiplo sector also counts less miles.
For instance DEN-ORD-LHR (UA938/UA938)total 4856 miles but when I add to my RTW (using RTW calculator) it shows 4678 miles. Or DEN-IAD-LHR (UA918/UA918) total 5145 miles and counts also 4678 miles.