QTR-Quadtone RIP

I am still having problems profiling UT14 to Epson Premium Glossy Photo Paper, particularly with setting the default ink limit and getting blocking up in the blacks.  I'm thinking I may be having a problem linearising the profiles.  In order to get my head round what is going on I have been checking the 21 Step Wedges I was using, one is a tif in the Eye One folder, and the other was from Paul Roark's website; http://home1.gte.net/res09aij/21-Step_GG22_L5.tif (marked for Gloss Paper).

Both of these show to not be linear in values for the graduations.  Values I get (% and on 255 8Bit Luminance Scale) are;

Black 100% is 100% (0), 95% is 98% (5), 90% is 92% (19),  85% is 87% (33),  80% is 81% (48), 75% is 76% ((62).  The Luminance values do not match the figures on Paul's test strip.

I have also checked a 21 step wedge from Keith Cooper's site, this does match the % values.

Have these wedges been created with a conversion factor to open up the blacks in linearisation?
Have I been using the wrong wedges?
Which wedge should I use for linearisation?
Is there a problem occurring in Elements when I open the images?
Might there be something else I am doing wrong?
Should I get my camera, enlarger and darkroom kit back from whom I gave it to?

regards

Ross