Something you put on that page has invalid html, which means there is a missing closing tag. It’s causing browser to interpret the sidebar (id=secondary) as part of the content (id=primary.)
See screenshot. http://prntscr.com/7yaakn
The sidebars (id=secondary and id=secondary-2) and content (id=primary), should be independent from each other.
See screenshot. http://prntscr.com/7yabka
Please remove your widget one at a time and your content on that page, one at a time, to find out which element has missing closing tags.
That’s all we can help on this issue.
If you need us to physically troubleshoot for you, you can contact us via our service page. https://theme4press.com/services/