I just ran a scan on your website using the latest beta, and it seems to look correctly to me. Is this more in line with what you wanted?
http://www.coffeecup.com/files/forums/sitemaperscan.png
I also looked closer at the pages that you think are duplicating. They really are not, you just have the same name associated with multiple pages:
Both of these have the title of About Us.
http://www.cofchristknoxville.org/hope-center.html
http://www.cofchristknoxville.org/angelfoodmin.html