tech help needed

This is a request for some technical help regarding feeds. Every once in awhile someone tells me my blog feed is not right. The reader I use is Bloglines. When I subscribe to my own blog, it find three feeds:

http://rianniello.blogspot.com/atom.xml
http://feeds.feedburner.com/RickIanniello
http://rianniello.blogspot.com/atom.xml?bsuser=rianniello

Clicking any of the links seems to give me a good feed. But if I preview the feed, the last two are old. I have no idea how to fix that or even if that is important.

Are any of you tech savvy enough to help me out?

Technorati Tags: blog feeds, technical