Photon not cropping images as expected

Hi,

Im trying to get all images in a list to have a “hard crop” applied to them, and I can achieve that without Photon enabled. However when I enable Photon all images get different heights, as if they were only resizing to a desired width.

If you at the source though, you can see that the request being made specifies the desired image size 320x240px:

<img src="http://i0.wp.com/www.webipack.com/mw-public/uploads/sites/24/2015/01/Depositphotos_4459897_original2.jpg?fit=320%2C240">

This happens in the following url:
http://outline.webipack.com/services/
(list at the page center)

Anything I can do about this?

https://wordpress.org/plugins/jetpack/