XF 1.5 Breadcrumb arrows appear when browser window is shrunk down.

so currently i have breadcrumbs at the top of my page below navigation but when i shrunk down the browser size the breadcrumbs dissappear but the arrows remain. Also the first few lines of the forum list also disappear when i shrink down the browser window. Im thinking it might have something to do with the ad banner i have in the header as well. can someone help guide me so that everything stacks up right with the proper padding when the browser window is shrunk down?

heres a link http://marsh-reef.net/marsh_xftest1/index.php