realtor and ss purchase for primary

[K Murray]

Ok, REALLY long story, won't bore you with the details...just he facts. Short sale purchase for primary residence, rec'd bank approval (relators agrees to take 5% instead of 6%), tilte work came back with IRS leins. Homeowner attorney is working iwth IRS to move then to homeowner's 2nd property. Whie this is going on, my attorney informs me that if the hose does not close by the bank deadline (we are ready, just waiting on lein removal) that the realtors take a second commission cut, down to 4%. The realtors claim that they never agreed to this part (it is in the short sale contract) and will kill the deal entirely if this happens.
Haven't spoken to attorney yet, but will.

So question....Can they do this? Do I have any recourse? I realize that they are playing chicken and want me to come up with the money, but no go. So just looking information and advice.

Thanks, you guys really are the best information that I have and I dfon't want to go to the attorney unknowledgable.

callie