In another thread I confirmed that there is a problem with the same image being attached to all subsequent posts when updating a feed to draft posts in my case. http://wordpress.org/support/topic/wrong-images-in-posts
In fact the problem is not just about images it seems any links are also mucked up in a similar way -
<a href="http://adventuretravel.about.com/od/treetopaboveadventures/ss/Skydiving-Skydive-Go-Adrenaline-Rush.htm">Read Full Post</a>
The anchor was embedded in the feed but href in the anchor is pointing to the previous article updated on the feed!!