I'm trying to book a trip in December, and want to maximize MQMs earned. On the return trip to EU (SEA-AMS) I've found a route through ATL (few hours layover). My calculations say that will give me ~1000 MQMs extra, but delta.com's calculations on the confirmation page seem to ignore the extra 1000 miles as if I flew SEA-AMS non stop. Anyone with experience with that who can explain me if Delta only count miles based on the "shortest possible available route"? Thanks!