This is a screen shoot from web master tools. It shows I have a large number of not selected pages, first I thought if I fix duplicate content with 301 redirects and a sitemap, the problem will be solved, but it doesn't seem to be making any difference.(On 9/16/12 I made sitemap)
I have so much not selected index
google index
It's explained in the tooltip next to Not selected:URLs from your site that redirect to other pages or URLs whose contents are substantially similar to other pages.If you had duplicate pages and you redirected them all to a canonical version, the Not selected number will not reduce because instead of a URL being ignored due to duplication, that same URL is now ignored because it redirects somewhere else.In short, it should not be anything to worry about. You are doing the right thing by redirecting. More information here.