Hi, not 100% sure this is the right place to ask this but i'm having some serious trouble with this page of a site i'm working on: http://www.contentsherpa.com.au/?cat=11

When I open it in firefox the page will load wrong (all the boxes squished together) but when I refresh the page it all straightens out. When I open it in chrome, it remains broken even after I refresh.

I can't figure out what is causing this and was hoping someone could help!!

The site is built using wordpress, and my theme is based on one called Gridly (if that helps at all?)

Thankyou!