Actually, this problem is very real. This exact situation came up in Dallas-FortWorth when my FO was trying to commute to Atlanta on Dec 1st. She wasn't sure if the travel changes went into effect on the 1st or the 4th so she tried to list for the jumpseat instead of non-rev. The Delta agent denied her the jumpseat even though there were about 90 seats open. He explained to her that ASA pilots are no longer allowed to jumpseat if there is already one jumpseater listed, no matter how many seats are open in the cabin.
(In this situation) ASA pilots will be required to use the travel benefits and sit in the cabin. However Delta will still welcome as many off line jumpseaters as they can accomodate free of charge!!
As we all know, gate agents sometimes use their own rules when it comes to putting people on an airplane. This one was doing exactly that. Send it through your jumpseat coordinator to ours. Give all the details (flight number, gate agents name if able)