Bumping this thread. I have a future reservation for JFK-FLL-JFK, and "Miles Flown" is showing as 1,098 on the outbound and 1,141 on the return.

And of course, neither of these figures match what I've earned on previous JFK-FLL flights, which is 1,068. (And FWIW, GCM is 1,069, and the Miles/MQM/MQDs shown when making the reservation seem to be correct based on a new search.)
Is this a known bug? Can I argue with DL and get the incorrect/higher number from the reservation page???