Originally Posted by
matthilein

Thank you -- I just tried but only get the same info. See screenshot. I note that it gives the fare class paid/flown as O/O. Not sure what this means? As I said, the ticket was a normal purchase on the Delta site, and there was no upgrade involved.
I would guess that the system thinks you have a business class award ticket, fare class O (and "purchased" as a business class award ticket, not upgraded).