Shawn loping a horse. As you can see his feet are behind the cinch.
Shawn stopping the same horse. Notice his feet are just in front of the cinch. Also note that his feet are not quite as far forward in this picture as they are in some of the other pictures of him stopping. Now look at his rear. It is up off the seat. If he had his feet a bit more forward that would not be happening.
Part of the stop is rolling your hips under, taking your legs off, putting about 60% of your weight into the stirrups and moving your legs forward. It is not an either or type thing. You have to have the whole package.
Do you want your feet up by the top of the shoulder??? No you want your legs forward just in front of the cinch which if you look at these pictures you will see that is right were they are. Just slightly in front of the cinch legs off the horse and weight into the stirrups.
Here is anouther picture. As you can see his feet are more forward and you can see his rear is more in the seat.