BMW Questions? Ask a BMW Repair Expert for Answers.
Have you had the alignment checked? Any sign of tire tread wear that is not even, ie more wear on the inside edges of the front tires?
The rear wheels being misaligned can cause issues, but I don't think like you are describing.
If the front wheels are toed OUT too far, it will react normally when turning back and forth- as the car will want to follow the wheel that is already directed in the direction of travel; but when trying to snap turn like you described, it would weight the vehicle toward the outside of the turn, that wheel would be less turned toward the turn, more straight, doing exactly like you described.
Caster tends to affect how the steering returns to straight after a turn. Think of a bicycle- you can ride with no hands because the wheel wants to stay straight ahead because of the slight backwards tilt of the steering angle. Having it too straight up and down makes it "twitchy" steering. Camber can affect how it corners, but less than toe.
Everything is adjusted in a specific order on an alignment rack- certain adjustments (caster, camber) are done first, toe last.
It depends on how quick your maneuvers are- being toed out will make it quick to react to light movements, but a quick snap will roll it to the outside of the corner, where the outside wheel will take the lead- and it is toed out in the direction opposite of your turn, or at least in the case of the wheel being turned, LESS than the angle of the inner wheel. So it will not steer as sharp as at lower speeds.