The post template is the same as your standard post template except for the addition of the Key Facts and Table of Contents boxes.
What have I done wrong?
Supplementary question: I would like to make the space for the site header image (i.e. the Red Arrows picture) about 36 px deeper but cannot find where this height setting is. It is obviously not “header-image” as that only changes the Aeroflight logo. (Ideally the Aeroflight logo should be on the top white space aligned with the About Us menus, but there is no setting for moving it).
When the sidebar drops down, it means you have an HTML error somewhere on the page.
This means you have an opening HTML element: <div>, <p> etc.. without a closing element: </div>, </p>.
To increase the height of the header, you can use our Element Spacing add-on. Go to “Customize > Element Spacing” and increase the top and bottom values for the header area.
I have the same problem using page header (GP Prem add on). As long as I use no background image the sidebar is shown correctly at the right side. When I switch on the background image then the sidebar is positioned under the post.
As you wrote this is a closing problem of an element. Might this be caused by the add-on?
the site is on localhost. Following your comment I think it makes no sense you send you a hardcopy of the screens. I come back later in development. Thanks for now.