If I select a container or not, if I select full width or not, I am not able to position the content like before. Thsi is what I get: https://www.abeauty.ro/bf/
Maybe I dont understand what to do. Can you explain more detailed please?
Select the Page tab in editor sidebar and scroll down to find it in the Layout Meta Box.
With that enabled you DO NOT need to set the individual Block to Full Width.