[Smush Pro] image sizes

I have an issue with my images on a site that's driving me crazy:

http://1+7.+++.15.+++/products/pedestal-systems/

I am trying to make that top image full-width. I am using the single image module, normally on other sites, I am writing full as image size and it becomes full-width.

But here there appears to be a max width of 800px assigned by Smush CDN (Automatic Resize) that I cannot override.