Sidebars appearing at the bottom of the page

Hi,
I am using Theme Forest BeTheme with Visual Composer. I have created a custom sidebar in the theme options - sidebars general tab. Setting 23% Right sidebar selected forced for all pages. I installed a WPMUDEV "Recent Custom Posts" widget in the widgets section and am attempting to display WPMUDEV Classified posts down the side of the page. The selected content is displaying nicely - except it appears at the bottom of the page ????

So I then installed Custom Sidebars Pro - but still can't get it to appear at the side. I realise it is likely a theme issue around CSS mods. I have read other posts relating a similar issue, but any ideas as to what I am overlooking or where I have stuffed up?

Here is a link to the staging site: http://site1.community.market/high-street-high-school/
scroll to bottom . . .