Originally Posted by
DFW Refugee
Shy:
You MIGHT be a bit confused on the DAL J/S policy. The 15 minutes prior to scheduled or delayed departure time will hold a J/S reservation for a DAL pilot. If another DAL pilot is standing by for the J/S and the reso pilot is late, the standby should get the seat. (I watch the clock like a hawk, and have asked the agent what time they have, just to be sure I get the seat, as the standby.)
If there's an OAL pilot waiting and checked in with the agent, a DAL pilot can get the J/S, even without a reservation and within 15 minutes, IF accommodating the DAL pilot doesn't delay departure. (I'd paste the text from our FOM, but that's frowned on by DAL.)
As for closing out early, I'd make note of the agent's name, date, flight, etc... and report it to my CPO, (DAL), especially if it cost me a hotel stay! 
Good Luck to all on commuting! 
had that happen a few months ago...agent came to close the door and i got pulled off by a last minute show....all part of the game.