Sidebar missing from Posts but appears on Pages & Archive List

Website is http://mHealthTalk.com Sidebar content is missing from blog posts but appears fine on pages and archive lists of posts. Under Layout Options, the Default Layout = Content, Primary Sidebar. Even if I manually modify Layout Options on individual posts, the sidebar content is missing. Instead, I get what looks like an empty placeholder with no content. Of course if I choose a layout option with No Sidebar, it displays correctly. Is there a different sidebar version for Pages and Posts that I somehow messed up? I just installed this Gridalicious Pro theme and have been working on it all day (now 6pm).