Visual Composer is duplicating sections….

I have just installed this theme, and I was working on the ‘home’ page in the visual composer and all the sections were getting duplicated, i thought i might have clicked something so I started again and it keeps doing it, i even switched to the ‘home 9’ page, and it has done it again……

How to fix this and restore the pages back to the original?

domain http://www.oslowebdesigner.no

Thanks