I’ve changed your Thumbnail Height from 100 px to 80 px and i’ve clicked on “Submit” button ( from front of the page – right side ) and everything works properly.
You can se here :http://andreacasagrande.com/dop-test/
Please click on “Submit” button ( from front of the page – right side ) after you made the changes for saving its.
after several attempts to set the gallery, two weeks ago, I was unable to log onto WordPress after several problems (it was very slow soon after and then I got an error script), therefore I had to delete everything, uninstall WP and databases loosing the whole website content.
I switched to bootstrap eventually, which is faster, clean and better as far as I am concerned.