tlcbikes on "[Theme: Simple Catch] How to add a div to a page without messing up the page width?"

As the title says in my team members pages I have divs that I have put into the page content http://www.tlcbikes.com/team/paul-friel Same thing as my products page too http://www.tlcbikes.com/shop
When I do this it is fine on a PC but on mobile browsers like Google Chrome the page does not adjust itself to the width of the screen.
Do I need some specific class or css for my divs to stop this happening?
Any help would be great! Thanks.