Foreclosed on again after sale rescinded by bank

My house originally was foreclosed on last year (Oct 2010). Since, I had tenants at my home and the proper lease agreement, the bank was unable to evict me or my tenants till the the lease term was over, which was the following August 2011. When August came around, I instead received a new Notice of Trustee Sale. I was in shock because I thought my house had sold. Anyway, I went through my past correspondence from the bank and realized that I had overlooked an important document. Apparently the bank had rescinded the sale. The house was back in my name. Unfortunately, they have proceeded to foreclose again.... The question I have is, does the entire foreclosure process start over, meaning, do I need to receive a new Notice of Default? The bank has not recorded a new one, and I'm wondering if they have to since the original sale did take place and was sold back to the bank, then returned to me months later. I would think they would have to. I would like to stop the foreclosure process or delay it, would this be a valid reason? Thoughts?