The Q&A plugin is pushing right sidebar content below Q&A content

Hi-- I'm trying to use the Q&A plugin on the Expo18 theme (URL below). Even though I have selected the right-sidebar template for my Q&A pages, the sidebar is pushed below the Q&A generated content, both spanning 100%.

I don't know why my item was marked as resolved...I hope you can help me resolve this. This is the plugin that got me excited about subscribing to wpmudev. I'll be sad if I can't use it.

Thank you,