problem when I refill my page

I have a problem (I think with the javascript loading) : when I am on my home page, if I clic on the logo on the left (“BeComm”) to refill the page, the element appear onte time on two glued on top of the page. I don’t know what must be desactivated to resolve this problem. (I have to tell you that this problem doesn’t exist before I put this plugin).

Thank you for your help.

The page I need help with: [log in to see the link]