Originally Posted by boeingair
I didn't think much of it until now--that segment still hasn't posted to my account. (While it was the last segment on my itin, the other 5 posted a while ago).
Could these occurrences be related? Should I call MP CS?
Indeed. I have seen more occurrances than I care to count when passengers have been mistakenly offloaded (often by an agent in another city - perhaps upline in your itinerary) from a flight. the coupon may still show open and therefore it hasn't been credited to your account.
Happy Travels!