Moving Main Content To Top breaks everything

Hello, My client is an hosting facility. => staging server URL = http://mda2.ddns.net I use Catch FS Pro to build a page with N section Rows. A header (using the Main Content), A featured section (to show my clients "top" features), a services row, a Hero section which shows a google map, then testimonials. The Header (main content), points to my Home page which contains a slider with text (using a Slider plug). Since I started the project using the free version (until client is satisfied), I could not move the Main content section to the top (My main reason to upgrade to pro). But when I move the main content to the first row, all the other sections disappear. I don't understand.