When an owner signs the contract, the listing has to be posted as pending on the MLS. (in our system in FL)So by not signing, the listing stays active and other offers may be taken. Most banks are requiring the owner sign the contract before they will start negotiations.
It's just a game. Short sales are becoming more difficult with outcomes usually resulting in foreclosure and then being relisted as a bank owned. There are better deals out there then short sales with less headache.
RE/MAX Tropical Sands