I booked PHX-DEN-IAD purchased P fare
I got to the airport a little earlier and took an earlier flight PHX-DEN via Standby a few hours earlier than my original flight, the only open seat was with in Y, so I took it.
PHX-DEN show up in my statement as V fare for some reason, am I not entitled to the fare I originally paid for if I took an earlier flight via standby?