Ah I see, thanks for the pic. Those darker parts on the right are reserved for controller inputs, and the darker parts under Keyboard are axes. 

You can rebind your inputs, but you should use the + fields. Instead of binding Gas, for instance, you want to bind Gas+. Same for Brake: bind Brake+ to the key you want to trigger it.Steer+ is steer right, Steer- is turn left.

I'm using a Unity input package that autogenerates these buttons, because I'm too lazy to make this UI rebinding system myself, so I don't have much control over it, sorry. Since gas/brake/steering are linear inputs instead of binary on/off, when you add a keyboard key, you need to define a key as "when this is pressed, treat this axis as full 100% input."

hell yeah, thanks for the update