RE: Bending at the waist? Contorted?
Jeff it's your anchor that changes.
If you draw a triangle from your anchor to your eye out to your sights and back to your anchor then change your form other than anything than bending at the waist, ie dropping your arm, that triangle changes ergo, your anchor changes.
Think about it this way, If I took your bow, I could halo your peep/sight the same but my POI may be totally different because we anchor differently.
You may not even realize your anchoring differently just to get that halo effect but indeed you are.
Go out and practice it, bend at the waist on one shot from an elevated position, then shoot one standing upright but simply lower your arm but keep the halo effect. I'll lay $ you'll shoot high on your second shot.