747 LDG
Rage,
This phenomenon must have something to do with the yaw axis of the airframe being located just in between the body- and wing gears.
If the downwind winggear touches down a split second before the upwind winggear does, the asymmetric forces then pull the aircraft's nose away from the wind.
A pilot would know more. I'm an engineer, I don't fly...
Certainly body gear steering is not a question. This system is locked out during this flight phase, as mentioned before.
Regards, Ballpoint.