Divi Builder bug

Hi ya’ll!
Thanks for taking the time to help me solve my problem.
On my checkout page, there is a something bugging.
NOTE: You may have to visit (smarthomeline.se/shop) to add an item to the cart –> then proceed to checkout on the cart page.

When I’m in the Divi Builder, everything looks fine.
But when I exit it, the payment provider disappears, the color changes and there is an underlying link through-out the module that redirects to a completely different page..

I have no clue what’s causing the issue at hand?

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