回複：an interesting case about my I-485; help needed

My wife got the message by email on Aug 26, 2007 saying that on Aug 24, 2007, we have mailed the document to ......

I guess it was because she called the USCIS two weeks ago and a letter sent to her was returned(return service requested for all gov letters). The USCIS is trying to re-send the letter. The details of the letters can be different.
As a primary applicant, I called USCIS and I was told that my name checking is not cleared yet. We had 3rd FP done on Aug 2, 2007. I hope this will help. By the way, our PD is 05-21-2004.