I find the website quite confusing when it comes to changing a flight.
My situation is the following one, I am on FRA-EWR-FRA in P (PNCDE60W), flew the outbound, and am now trying to have the return date changed (to 3 weeks prior).
I won't be in violation of any stay requirements whatsoever and even the itin itself is unchanged (UA960).
When changing the reservation on the website I was told that no fare difference applied but that I had to call in to have the ticket reissued.
Now I'm being told that I need to pay $54 in fare difference.
Maybe my reading of the fare rules is wrong, but doesn't the following mean that there shouldn't be a fare difference?
Code:
REPRICE USING FARES IN EFFECT WHEN TKT WAS ISSUED
I checked how much a similar ticket would be when booked today using the ITA Matrix and the difference indeed comes out to $54.
The fare associated with PNCDE60W must've increased slightly in the meantime and YQ is also different (and taxes obviously).
I'm just trying to figure out whether I indeed have to pay the difference (i.e. the agent on the phone is right) or whether my understanding of the fare rules is correct.