QTR-Quadtone RIP

I am trying to set up my 2400 using Cone Color Inks on Enhanced Matte
to print B&W with QTR.
After determining an ink limit of 55% I measure the 2nd print of the
calibration target using this ink limit of 55%. The max density of the
LLK measures density 0.46 which matches about 29% on the LK strip. The
LK max density measures density 0.99 which matches 33% on the K strip.

If I plug in these values the graph of the different inks looks very
jagged where the LK and LLK overlap and the print looks bad. If I go
ahead and linearize these values the curves look even stranger and the
print is even worse.

Any ideas on what is the problem.

Thanks for any help.