It looks like you edited the side navigation content area and updated it to have a full page of content. Since that nav is on the left side of every page, the content overlapped into the other pages.
I updated the side nav editable region and removed the overlapping content. I'm not sure where that content was intended to show, but you shouldn't put it it the side nav area if it is intended for a particular page (because it will show on every page instead).