Search is slapped across the images of the vans on the header. May it’s too hidden there? I’m still using google site search, which is a problem as google is re-learning the contents of the site.
As for the theme: it’s a responsive design. I’m using Chrome and it’s working ok for me. I’ve tested in every browser and mobile device. If you’re browser is in a small window you may find the content gets chopped up. Ironically the solution is to make it even smaller so the theme goes into mobile phone mode.
If you provide screen shots of your problem I’ll happily take a look at what I can do to make your experience better.