Hueman Theme – Content Width Issue

Hi,
I’m using Hueman Theme for my blog at TheSwapFiles. My theme configuration is as follows,
Two columns and boxed layout.
Content on left,secondary sidebar (200px width).
Theme width set to 1441. I’m also using floating social links bar.
I’m using AdSense ads with 728px leaderboard ad unit. It is inserted mid-post.Now my issue is,
When single post is viewed from the browser,content width reduces to below 720px. Because of this, some part of the ad is cut and the social links bar also overlaps it. I don’t have problem with the overlapping links bar. However,if I view the site with browser window size reduced, theme automatically adapts to it and shows the page with sufficient width. But it fails to adapt to the screen width in full size window.
I’d be grateful to you if you can show me the way to increase content container to the sufficient width,say 730px.