Whether you are using a Nunchuk or a Classic controller, moving the stick left will only move it very slightly. Diagonals are even worse, resulting in slight movement on all axes
The just released version 0.9.5 has detailed deadzone settings for each analog stick which can be used to weak Wii analog stick and many other hardware and software issues. Can you give that a try?
Whether you are using a Nunchuk or a Classic controller, moving the stick left will only move it very slightly. Diagonals are even worse, resulting in slight movement on all axes