Check with agent for priority?
 

I just checked in for DL2740 SFO-JFK. I am on a B fare and DM (and also have a cert in the reservation for an upgrade, as it continues to ARN). After checking in, when I view the upgrade list online, it says:

"ifette 3 passengers on Upgrade List. Check with agent for priority."

Has anyone ever seen that, and if so, what the heck does that imply? According to the same page, there are 4 seats open up front, I am hoping that as a DM on a B fare I will be able to get one of them...

I would guess that it means you got the upgrade but they need the certificate information to clear it YMMV.

I think that message means that you've choked Delta.dumb

Never saw that message, but on a recent SFO-JFK flight on 6/18 I went from 1 of 16 with 5 seats available to vanishing off the list and then 3 seats available.
Turns out when I 'vanished' I was in the process of being upgraded by the GA but it wasn't fully updated in my itinerary on DL.com

I've only been an FO for a few months and upgraded just a few times, but every time I've actually been upgraded after OLCI, the above "Check with agent for priority" is what I see if I view my reservation online.