Rss feed formating problem

I am using aWeber to send email updates on my blog posts. They call it a Blog Broadcast

Here is my problem: The feed seems to have different formatting for each post. The feed appears correct when you look at it: http://www.keepingupathome.com/feed/ The source code shows that each post has different formatting. When aWeber pulls the feed and sends it out, each post has a different look.

I checked with my host and was told that the feed is generated by WordPress and they cannot fix it. I don’t know how to fix it either. Any ideas?

Thank you for your help.

Blair