Fixing the width for registering on updated BuddyPress site

I just upgraded my BuddyPress/Wordpress site to the most recent and cannot find where to change the registration page to get it to use full width - see page here: http://denvertherapistsnetwork.com/register/

Prior my upgrade notes said below, but now in the bp.css file it seems this is already in place, but still not working. Any thoughts?

themes/bp-social/_inc/css - Update the bp-css.css file in this directory with the following code. This fixes the registration so it is full width.
#signup_form .register-section {
float: left;
width: 100%;

}