QTR-Quadtone RIP

I have begun making satisfactory B&W prints as I noted in my last
post, which was answered helpfully.  So now I am trying to create my
own version of the 3MK-EpsEnhancedMat curve from scratch for my R800
per the EyeOne folder.  After lots of problems initially with the
Measure tool I got what seemed to be several good readings of the 21x4
random tif printed with QTR.  But I get an out file that states the
Lab values are not in order and cannot be linearized.  I believe the
problem is that the 100 step has a lower density than the 95, so this
ruins the linearity.  This took me a long time and I got similar
errors with earlier attempts.  The EyeOne is working well according to
the Diagnostic program, and I used it to make good ICC profile for UC
inks on glossy paper, and to calibrate my monitor. Any on or off post
suggestions gratefully accepted.