My son and daughter recently flew DE in Prem Econ (purchased via Condor). My daughter's boarding pass shows her Alaska MP# but my son's shows his KTN as his FF#. When they checked in the agent reissued their boarding passes in order to add the KTNs and they must've inadvertently swapped out my son's Alaska MP# (which he is positive he entered during online checkin) with his KTN. I've heard it's already like pulling teeth to get the miles to credit from DE flights - I suppose the chances of Alaska awarding the miles for my son's ticket are about nil now, right?