Originally Posted by
MADPhil
And if OP had a KTN from his/her Pre-Check in their profile when the Dec. 24 ticket was booked then it would be a good idea to check that the GE KTN makes it to the reservation.
Just checked and it looks like the KTN I had in my profile was, in fact, the Global Entry one. I think I had put that in there a while ago, now that I think of it. So hopefully it should be seamless.