My own avatar image remains blank

There’s a chance I’ve misunderstood what this plugin does so apologies in advance.

I installed this plugin in order to choose an image for my avatar, which appears against my comments with my readers. I went to the plugin Settings but could only set an image under ‘Default Avatar’. This means all the avatars will have this image right? I set the image anyway and you can see in the link I’ve provided that it shows against the readers’ comments but not mine. I only want to change my avatar image. Have I got something wrong?

(Not sure if this is relevant but I’ve also set the same image in Users -> Profile).

The page I need help with: [log in to see the link]