QTR-Quadtone RIP

I've been trying QTR on my Epson 4000 and in some cases it really
looks 
great.  I just tried the UCpkn-EPremSMatte-neutral-2880 with some
roll 
semi-matte and all the prints come out brown and white not neutral.  
Other papers such as Enhanced Matte come out fine with their curves. 
I 
run QTR with EPremSMatte curves, photo black ink at 2880-better and
its 
a very warm brown.  Sepia curves looks sepia, but neutral isn't
neutral.

Also, I see very noticeable banding when using QTR which I don't see
in 
color work.  What might that be?  Or is it just something that shows 
more clearly in "black and white"?  When I run the nozzle check 
manually, all nozzles look like they are firing.

Thanks.