I would love to see this fixed at some point. It makes it pretty much impossible to have a gamepad setup that works for both wheeled and tracked vehicles, because of the conflicting limitations of the other steering bindings. That's a real shame, because gamepad steering is a lot nicer than keyboard and mouse.

Car Left/Right: does not have full range on an analog axis
Car More Left/Right: maybe this works with full steering wheels? Basically unusable with a gamepad stick though.
Car Left/Right (Analog): works great on wheeled vehicles, does absolutely nothing on tracked vehicles
Binding any combination of these to the same axis makes the vehicle difficult to control.