There is a current bug with the aiming sensitivity. As shown in the video, if you pull out your gun and hold LT before you fully get your weapon out, your sensitivity will not use your aiming sensitivity settings that you have set. You have to wait until you have to get your gun out to then press LT so your aiming sensitivity settings will be followed. First 2 times the gun is pulled out is the bug. The second 2 times is how to counter it.