So, just to clarify, you’re saying that you’ve been able to kill every unconscious NPC you’ve ever had laying in front of you with a single shot, from any weapon, any time, anywhere, with no exceptions. You never miss, you never fail, every time you swing/stab at an unconscious body you kill it in one shot. Is that what you’re saying?
It’s an everywhere issue, official, non-official, single-player. Do a search on the forums and you’ll see that it’s come up many times over the years. This is an issue that players have brought up since beta.