Sandy, I'm having the same problem as you, where the images in the articles are fine with regard to no right-click allowed. It's when the image is clicked on, thus opened in a new tab, that it is no longer protected.
I don't like the idea of having to add yet another plugin to load photos onto a page so I'm here searching for alternatives.
I don't want to watermark all the photos on my site, so that's not a solution at all, as my site is a travel site... People kind of come to see the photos.
If I figure something out, I'll let you know.