Navigation :: Turntable :: Mouse X-Axis Inversion (Option to Disable)

I love the Orbit Method = Turntable . But, when I am working with the view port facing parallel with the Z-axis, my mouse's X-axis movement inverts often. When the view port is upside-down, negative Z becomes Up and Blender decides that mouse operation should flip.
youtube.com/watch
I think the option should appear right under Orbit Method . It should also become grey when Orbit Method = Trackball since the option does not apply to Trackball .