Can't edit the captions in the Fixer Theme gallery.

Hi Support!

I've tried every way to make this work and I just can't figure it out. There is a gallery at the bottom of this page: http://kimlavinder.com/reiki/

When I go to edit the "Image Captions" I am unable to make them appear blow the image. They either appear above or elsewhere.

Can you take a look? I am not sure how to get this worked out.

Thanks,
Martiel

PS: support access has been granted for this site so you can take a closer look.