Digital BW, The Print

Just started using UT2 inks with Photo K on my 1280 and have noticed 
a bit of "pooling" or blotching of ink in the darkest shadows. It's 
actually creating a kind of "banding" of heavy black ink in the dark 
spots.  All nozzels are clean and fireing properly, though.  

Not sure if I got the right black ink.. part number is ARC-T007-UPK.  
Is this Photo K for UT2?  

Scanned the prints and put them here..
http://www.tronicart.com/ink/ut2.htm

I'm printing on PSPP with the UT2-PremSemiGloss-Neutral-1.acv curve 
at 2880 and Photo Paper media seeting.  Tried the Eboni curve aswell, 
with same results.  1440 dpi produced extreemly blotchy prints.  All 
lighter shades seem to print fine.

Any ideas?  Thanks for the help

Daniel Perez

 -oh, printing on EEM seems to come out fine.