Bud, most newbie backquiver guys have the quiver adjusted too high on the back. You shouldn't be able to reach the arrow nock unless you bump up the quiver with your bowhand or bowarm elbow.
The process is this: when reaching for an arrow, both arms go back by squeezing the shoulder blades together....one hand reaching for the nock, other hand bumping up the quiver. Choreographed movement. Then after grabbing the nock, both hands move forward, one drawing out the arrow, the other bringing the bow into play. The physical weight of the quiver will let it slide back into position, which helps the arrow clear leather easier. A wide quiver allows you to pull the arrow out on an angle (which is easier) unlike a narrow tube quiver which forces you to draw the arrow straight out the end and alot of guys don't have arms long enough for that.