What are the rules of an ex-wife turning in an ID Card?

I separated from the air guard on 23 August 2010 and surrendered me and my current wife military ID cards on that day? Today, 15 November 2010, I find out the personnel office encouraged my ex-wife to keep her ID Card until it expires in about 6 months. Why can she keep using the military benefits when I separated from the military 2 months ago? Most importantly—I am the one that served my Country? Why does she get more privileges than me and my current wife?