Gallery block not displaying photos properly on mobile

Hi

I have just discovered the Gallery block, and really like it, so have used it a few times in my latest blog post.

On the desktop it looks really great, but when I had a look at it on my mobile, all of the photos are not cropped, so they just show a certain part of the picture.

I have tired looking around for somewhere to edit the settings on this, but I cannot find anything.

Can you please let me know how I can add cropping to these Gallery block photos.

The link for the article is
http://dev.multikingdom.com/index.php?option=com_easyblog&view=entry&id=906&Itemid=389&lang=en

Thanks