prestashop checkout problems after installing new module

I have installed a one page checkout module.......[login to view URL] When I clear my cache and try to checkout in google chrome....the checkout page asks for identification number although this is deactivated in back office. Also checking the confirm terms and conditions box does not work and there are two boxes to add a comment instead of one and it is not possible to complete checkout. If i refresh the page 2 or 3 times it corrects itself. I have attached a screenshot of the corrupted page. I need it fixed asap as i am losing busuness on my site.