Originally Posted by
bocastephen
Did you get your question resolved? I'm about to do the same thing - 6hr flight, GPU upgrade pending, so I want to book an award seat to block the middle in my exit row, but it's only for one segment of my itinerary so I believe they need to book it as a separate record, but not sure how to handle check-in, boarding passes, etc or how the seat will show as "boarded" once I board with my primary boarding pass.
My most recent EXTRA SEAT booking is in the record under a separate PNR: EXSTLASTNAME You should be able to see it on line, and we print a boarding pass so that there is no confusion.