Protect content - a possible bug?

Hi guys,

I'm playing around with the Protect Content and I see that if I enable it for protecting a certain category, all the blog posts from that category are not find, resulting in a "No Results Found" error.

You can see it here, under "latest deals and discounts":

If I'm disabling the plugin, the posts appear. The site is under construction so let me know how can I help you in identifying the source of the problem.