Hi pixelquaternion, can you describe the locomotion you are receiving?
An easy oversight to make is overlooking current input mappings. If you started out from the default Third Person Template, when you add the new Axis Mappings for Left/Right to your project settings-> inputs, you must also remove the existing Left/Right key mappings from the TurnRate axis mapping. This should give you the desired result.
Let us know if that works.