I'm seeing issues with correct MQD posting on nearly every flight (~25k) posted for me this year. I'm sure I'm looking at base fare not total price but MQD doesn't match. It's usually off by at least $50-100 a per ticket from base fare (from receipt). I also noticed that SDC seems to really break MQD positing totally. SDCd segments have not had any MQD post for me. I've emailed DL about several trips and not received an answer yet.