Is this Shena??
I'm #1 on the upgrade list (phone app and GIDS) for FC and C+. FC is checked in full, but C+ has 2 seats open. (For some reason, when purchasing the ticket, I could only select main cabin seats.)
I'm expecting to get the upgrade, but never happens. 2 minutes before boarding, I see C+ go to 0. I see the GA laughing and talking with a couple, giving them new boarding passes and putting a bag tag on their baggage. I'm suspicious but don't immediately assume they got the upgrade. They could have went from stand-by to confirmed for all I know. (See, I learned something from this site.

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I went up to the GA and asked why I lost the upgrade. He claims he doesn't know. He said it could have happened at the ticket counter or online. I told him I know the seats are under gate control; only he could have given them out. I asked him point blank why he gave away my upgrade. He said he didn't and doesn't know why.
Of course, the GIDS tells you which seats were given to the upgrade. So, I know once I got on the plane, I could confirm if the couple got it.
I always board last to wait for any no-shows in first; and because I hate waiting on the plane, but I finally board. And you know who were sitting in the upgraded seats, the lucky couple. So, I go back to the GA and told he knew he gave my upgrade away. He still denied it.
So, before I write in to Delta, I want to check with the experts. Was this Shena or am I being a whiny-a$$??
For full disclosure.... from the time I bought the ticket, Delta.com, the app, my ticket and everything else said I had a main cabin seat..... but when I sat down, I was in C+. I felt a little sheepish...
I wouldn't normally care if I missed out on the upgrade; it happens, right? But I felt like the GA screwed me out of it. That makes a difference.
Anyways....