IE display

Hello,

The web site for my village : http://www.cellieu.fr has differents display on IE9 and IE11.

On IE9, on some computer the display is like as a tablet/smartphone.
On some other computers, the left widgets is override byt the article.

Please find in this document some screenshots : http://1drv.ms/1sxjudc

Thanks for your help and for your work.