Ok for a moment I thought it was true, but it was not.
I already confirmed that you just misunderstood what is going on. You said that when shooting, even without moving you can hit both targets. Which is true, but you can’t hit them at the same time.
When aiming in third person at a target that is to the left, you will get an x on the target. That means it is close enough to obstruct your bullet and make it fall there. If you shoot, the hit on the target with the X will count. And it will proceed to change sides to the right after taking the shot.
Then without moving, the target is now in the same position as your sight. And if you shoot again, it will switch back to the left and the same thing. HOWEVER, if you mean that the HITMARKER appears on the crosshairs instead of on the X, it is because it simply has not been programmed a hitmarker mode where you hit, but the HITMARKER appears on your crosshairs when you hit something.
So no, there is no double hitmarker or anything like that. Because if you stick to a wall and shoot, the bullet will fall on the x but there will be no trace of another bullet elsewhere.
Myth busted uwu