I thought the same, but the are pretty mutton withered. It doesn't look like that in the photo but I think it might be the angle and the fact his leg is cocked. I'm always careful to set it back more because originally it was to far forward.
Also, as you can see, he is obese. When I set the saddle back and pull up the girth it just slides forward right into their elbows. This guy's girth goes right from armpits to belly which is frustrating! They were getting girth sores pretty bad, hence the girth covers (aka, halter crown fleeces Haha!).
I'll definitely try to move it back though. It's supposed to be more like at the base of the wither, right?