I have more than 400 posts on my blog but in webmaster tool i saw sitemap just 26 urls submitted and 18 urls indexed. that's why?
i think you check our post and extra keyword are end and next submit request through google web,aster and i think google make indexig post are better and fast
In Google webmasters, you don't see duplicate URLs... It shows only unique URLs. If you have posted under duplicate URL, your Sitemap won't display all of your posts.
Is your blog hosted on WordPress? You can use the "XML Google Sitemaps" plugin to get more out of your sitemaps
Just submit the XML version of the sitemap and it will tell Google of the other URLs that are deep in the architecture and would be otherwise be missed. That helps to increase the indexed URLs.