Just a tactic I use when setting up something like your example within xsl...

Try doing a simple html page with the layout you envision.  Use just simple text in place of the 'feed' elements as placeholders.  You can check your layout by viewing the page with IE, or you can do it from vs studio.  I just use simple html w/o any of the xsl tags to setup the look and feel first, then I can work on the xsl, knowing that my layout is close to what I want.  XSL is pretty sensitive to any HTML issues, meaning that you really have to give it well-formed HTML, otherwise errors will be almost impossible to understand due to the parsing quirks - it's first going to assume that the HTML tags are well formed, and if not, then you get very curious xsl errors which take a lot of time to debug - only to find out it's really the HTML tags giving causing the errors.

Try sketching out the table with some sample data in the format you envision first.

I did find some issues with the table setup, which would cause any xsl tranformation to abort, so again, any HTML in an xsl has to be well-formed first.