Since this will involve changes to a security fix which prevents click-jacking that might be affected by custom styles, this can be changed in 4.1.x when users would be more aware that style changes need to be redone. The fix can be unapplied from .vw-section and reapplied to .ugc, which was not available in the desired scope until 4.0.24. Additionally, we will add an option to remove .vw-floatcontainer from sections (which was added specifically to prevent the behavior you desire).
You will never be able to get H=1 to wrap floated content. H=1 is a completely separate content box from the previous content. H=2 and other numbers do not start a new content box.