I haven't missed one technically. I did hit one high this year that no doubt lived. I hit her above the spine from a tree stand about 5 yards from the tree. Just burnt her backstraps up! Not sure how I hit her there and didn't spine shoot her but, it happened. I was too busy loading her in the truck to make the shot count

, stupid mistake. I'm 99% sure she lived, she quit bleeding after about 100 yards. I've been bowhunting for about 20 years and have taken lots of deer. But just goes to show what happens if you loose focus during those last critical seconds.
Its a little embarrassing to tell, but a good lesson learned! I did however redeem myself 2 weeks later and drilled one of her slick headed relatives.