I actually figured out what is the problem. It is the Disqus comment system. The reviews work just fine when the plugin is deactivated. Does this mean I cannot use Disqus on my site? What would you recommend me to do?
I understand, thank you for the reply and for providing me with a link.
Would you please recommend an anti-spam solution for protecting comments that works well with your theme in case I decide not to use Disqus?
Thanks.