Originally Posted by MSPeconomist

It shouldn't be possible to apply a SWU to someone else's reservation as they're nontransferable. If the PM phone agent had the other guy's account open, she could only have used one of his SWUs, assuming that he was elite and had some. Similarly, if she had your account open (which would happen when you enter your FF number at the start of the phone call), then she could only apply your SWU to your reservation.

At the time, did you ask the other Mr. Palmer if he had applied a SWU? Do you know what his status was?

I would have asked more questions of the second GA before moving. Did you notice another PAL, FI on the gate upgrade list display or on your device? After you were downgraded, did you look at the list again on your device to see where you were on the list at the end?

In the future, it would be wise to check the list for yourself before T-60 and again after the phone agent supposedly "corrects" your SWU coding.

Is the SWU gone from your account?

Call DL ASAP while it's still easy for them to see what happened.

Did your upgraded boarding pass have your correct first and middle name? Did the second GA give you a new coach boarding pass with your correct name? Did you get your original seat back?

Maybe people with common last names should always remember to check that boarding passes given to them at the airport have the correct full name and also watch for apparent duplicate names on upgrade and standby lists.