acegroupnyc: several probs with your CSS for single-post pages:
-- background-image:url(http://www.acegroupnyc.com/images/white.gif)
There's no image at that address
-- The background-xxx overrides in your #page rules are not prevailing over existing !important rules. You will need to understand those, and add !important to yours as needed.
--Your .widecolumn rule has very large left margin that's pushing div#content right
Hopefully you're using something like firebug. If not, see here:
http://grahamwideman.wordpress.com/2009/01/23/firebug-essential-for-cssing-wordpress/