Foreclosure after Chapter 7 Discharge

My husband and I filed for bankruptcy in September 08 after I lost my job. We did this to eliminate our unsecured debt and free up the cash to continue to make our house payments. Our attorney petitioned Citi Mortgage to reaffirm our mortgage. Our bk was discharged in December and I pulled our credit report to see that the mortgage account has been closed with a zero balance and was included in our discharge. Citi has told us that we can reaffirm IF the judge reopens the case and we were told by our attorney that he will not. We can continue to live here and make payments but they will not be reported. If we are essentially "renting" our home now, we can rent something much nicer for far less (we bought at the height of the bubble in 2007 and our house is not worth almost $50K less than our mortage is for). My question is this...if we walk away can the mortgage company report a foreclosure on a loan that was already discharged? Should we do a DIL - do we even have to do that since the mortgage was discharged. We were told by our attorney that we should act quickly if we are going to give up the house so it is seen as one hit. Any help would be greatly appreciated. Thanks.