Move Short Description Box under Description

I honestly cant remember if I adjusted the code in the last version or if it did it automatically but how can I get the short description box under the short description instead of to the right?

See my page here to see what I am talking about:
blacksheepmilsim.com/index.php/operations

Thank you in advance.

YOu need to edit the css.

/com_eventbooking/assets/bootstrap/css/bootstrap.css
line146 delete - float:left;
line 50 delete - float:left