Originally Posted by
acf1270
I remember it to be this way with NW using the flynow option, but as far as I know with DL there just has to be at least Y1 available to be able SDC onto a flight, even with a purchased T fare.
Yep. Crazy thing is sometimes Y1 means the flights is already oversold yet DL is still selling tickets.
Originally Posted by
acf1270
I guess that one should always SDC with an agent instead of using a kiosk, and hope for human error to factor in occasionally.

PSS/SMS would never, kiosk would never. Hurried airport agent would.