Items not adding to cart (sommerce theme and UPS plugin)

I have contacted the theme authors, Jigoshop, and I’m out of ideas. It’s not the theme because I switched to the “2014” and the problem persisted. I deactivated each plugin and attempted to add items to the cart, still did not work (did not deactivate jigoshop or the shipping plugin).

Could this be something on the server side? jigoshop has not been emailing me back.

Recently had to reinstall wordpress, jigo, and everything else after a fatal error. The site was basically rebuild at the start of this month. The website is http://www.surfdogz.com. From my home computer I can add items to cart, but not on any other device. If anyone has any input it’s highly appreciated.

https://wordpress.org/plugins/jigoshop/