Dodgy Slider. Close

Dodgy Slider. Close but no cigar!

I'm struggling with Upfront's built in slideshow element. I've got the desktop version working and looking how I want it to. But the mobile version isn't behaving as expected. The image doesn't remain central, for some bizarre reason it shifts to the right. It's also cropped so even if I try to hack it with CSS and try moving the image back over to the centre, part of the image is missing. When I open the Upfront editor, the slideshow looks nothing like the live version, making it impossible to work with. Take a look at the screenshots attached to see what I mean.