When I first got a back quiver I kept on tipping all my arrows on the gorund when I bent over, or in a very cool way dropping arrows behind me when I tried to put them back in. I kept losing arrows! Not from shooting them but dropping them! After a while I got used to it, the angle I needed to wear it at, how to hitch it up with one hand when putting arrows in, when to hitch it down when bending over etc. I didn't need to adjust my quiver, I just needed to adjust me.
Now I use a plains type quiver, and once again I tip all my arrows on the ground, and once again I'll need to get used to it and like a miracle I'll stop tipping them on the ground when I bend over!
Mark in England