If you did not disable sidebar in the Theme Options http://prntscr.com/r053rg every newly created page will have sidebar with default content (search) even if the main sidebar area is empty. If you wan to remove sidebar for the pages either disable it in the Theme Options > Blog (it will turn off sidebar for all the pages and blog) or you can disable sidebar for the page only using page options http://prntscr.com/r055bz
If you don’t want to disable sidebar but just to remove the demo content from the sidebar widget area then go to Appearance > Widgets > add the empty text widget to the Main sidebar.
Provide us with temporary WP Dashabrod access to your site to check the issue with the breadcrumbs.
