{theme saville row{ masonry grid sizing problems

I had website put together for me using Saville row theme. and it looks good but today I wanted to add a masonry grid page but for some reason the page seems to go below the footer and the width seems to small. it doesnt seem to be resizing itself correctly.
gallery im sure this is a problem with some custom css that the guy who built it has installed but I cant get hold of him and cant figure out why its getting messed up.
any help please?