This is not so much a Delta.com bug, but I think the same people who check here also were involved in the Kiosk software (I think???).

Anyway, my last trip I was in an exit row, and was upgraded at the upgrade window. When I went to check in at the kiosk, my seat was something like "3-A Exit" instead of "3-A". It was a 757, so the exit row would have been 27-F, not row 3.

I had no issues boarding, but just FYI about this small bug.