Yup, it makes sense and I know what you mean. I really feel the difference when I'm relaxed in the saddle - I think that worrying about my feet has been tensing me up, making me bounce and so making it impossible to make my feet do what I want them to do! So if I focus on riding the canter smoothly, the rest ought to follow more naturally. Practice, practice, practice ...
Thanks for explaining the feet thing. When you're riding in jump position, is it more balancing on the balls and lowering your heels, or putting weight into your heels? I imagine both are possible, once you've actually got some strength in your legs, but which should I be aiming for?
If you believe everything you read, better not read.