I have two blogs. Let's say http://name.blogspot.com/ and the other one is http://name2.blogspot.com/For blog 1: While submitting sitemap to Google webmaster tool I selected the option and then added rss.xml at last. (http://name.blogspot.com/rss.xml)Sitemap added successfully.For blog 2: I followed the same procedure but it didn't work.Then I tried to open the url (http://name.blogspot.com/rss.xml). The url was showing the atom feeds.I tried same with the other blog but that url is redirecting to the feedburner feeds. I think this is the reason why the other blog's sitemap is not getting submitted. Help me with it. 
How to add sitemap of a blogger blog to Google webmaster tools?
sitemap
From Using FeedBurner with Google Webmaster Tools:Sitemaps expect the original domain of  the website in question to be found in  the feed in order to function  properly; these  feedburner.com-rewritten permalinks  will not work and then cause Webmaster  Tools to report a sitemaps error.To fix it, change your sitemap URL from this:http://name.blogspot.com/rss.xmlto this:http://name.blogspot.com/feeds/posts/default?redirect=false