Doing a Short Sale where the seller is a Trust

We have been working a Short Sale with Chase for a while. The homeowners put the property into a trust, and the contract and HUD both reflected the trust. All of the sudden the negotiator comes back and says that the property can not be in the trust. WTF? If we take it out, there goes seasoning for another 90 days. The sellers did not transfer any interest, and they are also the trustees as well. Has anyone done a Short Sale with Chase/WAMU where the seller was a trust?