Bought a home in Oct 2007 for about $400k. Sold it via a strategic short sale in June 2010 for $141k which included Chase paying all seller's closing costs.

Only one loan, so no secondary lien to worry about.

Does the home you are trying to buy include additional liens? If so, and the secondary lien is with a different bank, the short sale may not go through.

If you have documented the issues with the realtor, you might be able to cancel your agreement. Otherwise, you can probably switch agents but still be on the hook to the original agent for the commission/fees.

Typically an offer is only good for 24 - 72 hours. I always put a 24 hour limit on offers. Most states have standard forms that realtors must use, which require putting a time limit on an offer. What was the limit stated in the offer?