I could be 100% sure, but at a quick glance it appears to be an issue with your tables.

If you open the page in your browser and do View Source, then look for "Shipping is a necessary evil" you will see that the containing table is set with a width of 100%. This will always fill to the max space going over your gray border at the right hand side.

As for the Date and Zen Cart News title, you could always edit the code of the news app to put these in a table instead of DIV to meet your templates needs, and change the CSS to match your sites colour scheme.

I did this at this site for my client. http://www.themobilephonesite.co.uk/...main_page=news

Matt