Footer Overlapping Content on Product Pages

I am building an e-commerce site for my client using a heavily modified version (both by myself and another programmer) of the eStore theme (by Elegant Themes) with WooCommerce integrated. Everything was working fine and we were just about to launch the site when the individual product pages started malfunctioning. In Chrome and Safari, the footer is not clearing the content section, and is instead overlapping the product descriptions and looking awful. It works fine in I.E. and Firefox.

Here is a screenshot: https://awesomescreenshot.com/0652huixda

I’m definitely not a PHP expert, so I’m not really sure where to start with troubleshooting the code. I ran the single-product.php file through a code checker and found an extra > that I removed and everything was working fine, but days later (with no action on my part, but possibly an auto WordPress update from the host) the pages were malfunctioning again.

You can see the site at organicreverence dot com, and the malfunctioning product pages can be found by clicking on the “more info” buttons for any of the products on the home page.

Thank you in advance for any suggestions. As I said, I am not a PHP expert, so take it easy on me! ??