With motiondave tips again, I solve all my motion issue n have the pitch force working perfectly now! All the forces n motion is perfect now! Thanks to xsim n bros here!
Must post the below great tips for newbie like me! This is what I call a must know in maths setting:
1) for lateral force to work, one of the axis must have inverse true n the other axis inverse false and switch around to see if the motion is correct.
2) when new output force is added like my case, the pitch force, always make sure the setting at right bottom of the maths setting - check to overwrite earlier force is not enabled.