I've had this issue a month or two ago and it wasn't something that was resolved in 24 hours. I tried having an agent fix it so the flight would show "First Class Waitlisted", but no luck....I ended up deciding to cancel that particular reservation and book something else so I never knew if it would keep me from being added to the upgrade list or not, but I suspect that if it doesn't say "First Class Waitlisted", you're not getting upgraded regardless of what anyone says....very annoying to say the least.