Hi,
I’ve got a similar problem, but non of your fixes helps.
You can see it under: http://lukas.teloscommunication.de (Sider was my library piece for the sidebar)
How do I get rid of the contained look? (I tried Layout>One container (even with full width) as well as Page Editor > Page Builder > Full width.)
The CSS Code moves the content below the sidebar.
I could really need your help on this one…
Tim