Obvious one for me, LBJ, recently was LAX/SEA = 98 MQDs (open jaw) then BOS/BNA + 144 MQDs - total MQDs credited = $242. Base fare paid (class W/G) = $385.90. So $144 discrepancy. Direct book with DL, DL flights, flown as booked, no changes. Reward - R = Mileage earned based on ticket price