I need more information.
As a listing broker, I require that a house under contract is always listed as Under Contract with No Kickout versus the "Under Contract" since that status shows too much information.
So you are the seller and you have a contract with a kickout (which means you cna still market it on Craiglist) , and a buyer that has a certain timeframe to sell their place?
Have you looked closely at your contract? It should say something about 3 business days beyond the deadline. But also it might require that the listing agent give notice to the buyer. So if there is a deadline of Feb 1st 2008, but the listing agent doesn't send a notice saying "you have gone past your deadline, you have 3 days before the contingency drops," it might stay on forever.
Just double check the contract. Some require action and notice, and some fall off by default on a particular deadline.
Hope that wasn't too confusing!