Ok my back is killing me more and more over the years and i want to get to the bottom of how exactly the spine and hips move through the swing!!

Ben Hogan says "imagine an elastic band tied to your left hip and that the other end is fastened to wall directly behind you, the elastic is stretched with increased tension. When you start turning your hips back to the left (for Rightys) the elastic will snap back to the left with tremendous speed!!" Ok thanks but I think he should have said "directly behind and up a 3-4 ft??" Right?? I really dont know im asking.....hear me out---if the band is "directly behind you" when you swing it will crank the bottom of spine when you try to rotate your body open and keep the same spine angle (avoiding reverse pivot)? like you took a push broom that looks like an upside down cross with the top sawed off and drove it into the ground diagnolly bending one side of the broom un-naturally up (the right side of hip would force naturally up)?? this has been my spine last 3 years as i have been forcefully trying to apply this.
I am thinking right hip should move more downward and right knee should move down as well correct?
Does anyone know what im trying to ask ? another words your hips should not change their perfect perpendicular position to spine correct (opposed to jamming one side of push broom in ground)?
I think me not knowing or understanding this question is still why i cant beat the reverse pivot! (humping ball slightly at impact)
Thanks