Having trouble finding missing div tag please help

On my site, on most pages, the footer, body, etc do not extend all the way across the page. This has happened before, and it was a missing closing </div> tag. I have been through every page, and can not find the problem. Can someone help me?

You need to log in to see the theme, ans I am using Theme Tester Plugin.

https://billboardfamily.com/wp-admin

USERNAME: sitepoint
PASSWORD: sitepoint

Then just go to any page to see what I mean. For some reason, on this page https://billboardfamily.com/monthly-charities/ it is correct. Please help me out. Thanks!