I'll echo that sentiment! It might take a few days. It may be a situation where you have to contact guest relations once you're home, but in the end Disney always makes good for the mistakes of CMs who were not trained correctly.
I'll second this (but in my one previous experience, I had to go the snail mail route because the CM I dealt with on the phone after returning home was giving me the same line as the CM's at WDW, and was nasty and condescending to boot).
In that experience, I knew to the penny what the upgrade should cost and when the CM quoted a higher number (presumably, he skipped the first step and only gave me credit for what
UT paid Disney for the ticket), four thoughts simultaneously ran through my mind:
1.) I don't want to haggle with this CM and start our Disney vacation with a bad taste in my mouth;
2.) I'm in a hurry, need this upgrade now, and don't have time to go to another guest services;
3.) Maybe Disney changed their policy since the last time I read the ticket sticky (which was about a week prior);
4.) If I just pay for the upgrade now (and assuming I am overpaying), maybe I can get another CM at a different guest services to give me a refund.
So I overpaid for the upgrade. Then, I couldn't find a live body anywhere at WDW willing to give me a refund.
What I learned from that experience,
is that it's better to get the price bridging right in the first place because, once you've overpaid, it's difficult to find a front line CM who is willing to put their neck on the line to give you a refund.
Alternatively stated, if you're going to price bridge and don't want to risk the possibility of a potentially unpleasant exchange with a CM (or you want to avoid potentially embarrasing a CM), at least allow yourself time to go to a different location in the event that the first CM you deal with doesn't know how to price bridge.