Layout problem with Woothemes' "EDITOR" theme

Hello,

I've got a problem with the Q&A plugin layout on my site (using woothemes "EDITOR" theme: http://demo.woothemes.com/?name=editorial) …

My site looks like the first screenshot. Then, after applying code:

add_theme_support( 'qa_style' );

on function.php, it looks like the second screenshot…

Thanks in advanced