HI,
The hosts have fixed this issue. If anyone is having issues with this please find attached the plugin file that needs replacing.
From the hosts:
We can prove it's not a server issue via the screenshot attached.
The /home/shopat86/public_html/test/plugins/system/recaptcha2/recaptcha2.php file is processing the recaptcha output. I've made several comments in the code to assist your developer in finding the bug. The thing is, it's processing the input, it knows the value of the input is true, but it's failing.
Now, if I make it run successfully each time - bear with me, the actual recaptcha plugin should fail at a browser level if the captcha isn't successful, from what I understand - all registrations work.
Bottom line - the issue isn't related to the server, I'm afraid."
This works well. Thanks