I set my bow to shoot points and shoot points. I set my bow to shoot broad heads and shoot broad heads. My bow wont shot them both at the same point. If they did I would. You can't even force it too.
If I hit and kill what I'm aiming at I really don't care if they hit the same spot but I hear ya. Your thinking something isn't just right if they don't and you want it to be perfect. I look at my bh and my point and say to myself "they aren't even close to being the same expecting them to act the same isn't reality".
Experimenting isn't a waste of time!