This is incorrect. VR does not fully migrate with BBF, it engages with either/both buttons. If you engage BBF and then release (disabling VR) and then subsequently depress the shutter button to take the shot, VR will (again) engage with the depression of the shutter release. This could be problematic in that the VR will likely not have time to fully engage meaning that the image may be even less sharp since the VR is settling in.
If you're using BBF and VR then it's critical to either keep the back button depressed for focus lock or give the VR time to fully engage again when depressing the shutter. The alternative is to shoot without VR and set the camera to make sure that your shutter speed is faster than your focal length.
Thanks
You see its like i said before your not allowed to go walk about ,with what you have said then i need to give it time,