I am putting the sidebar bug on record here, so that my employer can replicate it.
1) In Theme Options -> General -> Layout
Select 2 sidebars.
2) Add a page and set right sidebar as per following screenshot.
After publishing, the left sidebar will still be showing and the right sidebar gets pushed down.
3) Add a page and set no sidebar and full width as per following screenshot.
After publishing, the left sidebar appears on top of full width content.
There could be other bugs with layout. Therefore, it’s advisable to check all possible combinations.