Hello,
I have downloaded gk_john_quickstart.zip (v1.6) and setup the theme from there on XAMPP. I have made no other changes except adding the reCaptcha public/private key. When I set reCaptcha to disabled, the contact form on the contact page appears OK like the pic below
When I enable the reCaptcha setting, the reCaptcha box appears on top of the send message button, like the pic below and thus the form can not be sent:
The reason I set this up in XAMPP is that I was facing this problem on the site I'm building and I wanted to make sure I have a clean environment and the problem is not related to my customizations.