I have a site I'm working on that is responsive. I built my initial site structure using just HTML (http://www.corporateprdev.com/anderson/bootstrap). You can see the menu is in the masthead div and when the viewport becomes responsive for mobile, the nav-collapse class is used and the masthead div is hidden from a desktop viewport.

I took this structure and made a C5 theme, but I have to add the menu in two places in the header, one being in the masthead for the desktop version and the other in the nav-collapse for the mobile portion.

When I do this, the menu doubles up on the desktop, but not on mobile (http://www.corporateprdev.com/anderson).

I still have the hidden-desktop class applied to the nav-collapse, but the nav is still pulled into the bar.

Anyone have any suggestions?