I have a TATL flight out of IAD next Friday; I had applied a GPU to it upon booking to move from Y to J. The flight segment on the United website had previously shown "Upgrade Requested." Today, however, the United website does not tell me "Upgrade Requested." Instead, it shows the flight segment at the bottom of the reservation noting "This Flight Segment is Waitlisted" with the flight segment in R class.

My question: Is there any difference between "Upgrade Requested" and "This Flight Segment is Waitlisted?"

I'm hesitant to call for fear that I'll get someone outside of the U.S. who might kick me to the back of the waitlist for having such a First World problem.

Curiously, the United mobile website has shown Economy on the flight as fully booked for the past week and a half. I'd guess the flight is oversold in Y. Mobile website shows 10 seats available in J.