Hi,
You say that you still have problems, but that definitely fixed the problem I was talking about since I can now see the checkout page properly:
take.ms/peIMu
What other problems do you have ?
I tried to test your checkout, but after I registered, I never received the activation email in order to activate my test account and thus I couldn't check what other problems you could have.
Could you activate the account ?
Also, regarding the emails not arriving, it's probably an issue with how you configured the email settings of the Joomla configuration, so please check on that.