Edit in Customize Changed page width

Hi,
I made the mistake of trying to edit a page with the customize drag and drop feature but it messed up some things on the page. When I tried to revert it back to regular backend editor, it made the page really wide for some reason so it’s going all the way to the edges of the screen. I can’t find any options for this page that are any different than any of my other pages. I also can’t seem to find the option in this theme to revert to a previous page edition.

Can anyone advise on how to either get the page out of the new “wide” mode or revert it back to a previous version?

Thank you!

The page I need help with: [log in to see the link]