Sidebar display problem

Hello!

I have a small but annoying problem with my sidebar configuration.

Basically I want the right sidebar to be displayed on all of my pages and posts and have checked all the boxes in the atahualpa theme options "style sidebar" section accordingly. However, the content does not appear on posts and category pages (there is only the empty space of a sidebar).

Here's the link to the homepage of my website:
www.aestheticsofcrisis.org

And here's a post page that should have the sidebar but doesn't (but you can see where it should be)
http://aestheticsofcrisis.org/2013/interviewstmts/

Does anyone have any idea?