I have an upcoming LAX-SFO-JFK flight next week and it says that my SFO-JFK flight is waitlisted in R (for upgrade to C) using my RPU/CR-1 which I have applied when I purchased my tickets 2 weeks back. When I click on the "Upgrade my reservations" tab, it says the RPU is not valid on the SFO-JFK sector - should I be worried?