If you look at your itemized list of redeemable miles for the year, look for flights marked with a "*"; those earned a 50% "class of service" bonus for being booked in F/A/C/D/Z/Y/B. Upgrading won't (usually) put you in F or C buckets (you'll still earn the normal EQM for your flight), but being rebooked during irrops can often put you in full Y and thus earn that 50% EQM bonus.

See if you have any of those flights and factor in the bonus (which does NOT typically double under DEQM, mind you; such flights will earn 2.5x, not 3x, EQM).