Questions page visualization problems with qa plugin

I've recently installed the QA plugin in my site but when I try to take a look at the "questions" page I realize that the page appears totally different than the rest of the pages in the site.
There's no Logo, no menú, no slidebars, no title... and the content starts upper on the screen and becomes unusable.

How can I edit templates or css for this plugin ?
There exists some shortcodes to try to make my custom pages with them ?

Thank you very much.