Sidebar / Footer Placement Issue

I am working on a site for a client. He is using the “Bigfoot” theme. I am having a problem with the layout of the “single.php” page.

Everything falls into place very nicely on the rest of the site. An example can be seen here: https://www.buenolisto.com

The “posts” page which shows excerpts seems fine. But when I click through to see the whole article the layout goes awry.

See here: https://www.buenolisto.com/commercial-photography/tampa-photographer-mike-ramos-helps-save-a-womans-life/

It looks like what should be in the side bar is falling under the main content area. What should be in the footer is appearing in the side bar.

I’ve tried fixing this for about two hours and am stuck. Usually I can get these types of things righted myself, but I am puzzled.

If you need access to source files or more code just let me know. Any help would be appreciated.

Thanks.