Ok - I have checked your profile data and the LUT you have generated from it.
There is no clipping in the LUT at all.
Actually, as the display has a min black of 0.05 nits (which is high for a plasma) the Jeti probe is reading well in the low-light levels.
There are no major issues with the profile, although as there are some RGB Separation variations a full 3D Cube profile would be preferable and generate better results.
But, the profile and the LUT look fine - no clipping at all.
It would seem the issue is with the LUT implementation, not with the LUT.
Hope that helps.
Mob Boss at Light Illusion