Problems with right sidebar when using plugin

Hi,

I’ve been using Triton Lite for a while and am very happy with it, however I recently installed ‘Posts on Pages’ plugin which has caused a problem with the sidebar.
My right sidebar is now displaying at the bottom of the page instead of on the right of the content. Every other page is displaying fine, the one I’m having problems with is: http://www.huntinghouse.com.au/blog

I’ve been trying to get support from the maker of the plugin but have had no response, I really hope you can help.

Thanks,
Alice