I'm buying a house for sale by owner. It was for sale threw an auction by the owner and was not a forclosure. They just wanted to sell fast. We put 10% down at the time of the auction and agreed to close in 30 days. When we signed the purchase agreement it was dated for 10/4/2014 instead of 10/4/2013. Because the the government shutdown it will take about 3 week longer then the 30 days. Seller wants us to pay him additional $1000 and not take it off the purchase price. Is the fact that the purchase agreement was date wrong going to help me. Buyer said he will keep the 10% that we put down. I'm in missouri.