Roy,
Could it be, also, that you have been leaning your neck forward? In other words, your anchor at a shorter draw length, pre-back tension, could have indicated that you had not been standing with your neck erect. I see a lot of archers drawing while leaning their neck -- out of plumb -- toward the target. I seem to have a nice long draw, along with that feeling of bone alignment, with an anchor point at the corner of my mouth when I pay attention to my neck posture.
Just reflecting out loud and trying to get an idea of what others experience.
Stephen