Datacolor User to User Support Group.

I was using spyder 3 print to measure the 21x4 random file printed on Ilford gold fibre silk and whenever i read the 0 (paper white) patch it would show up as  light greenish/blue and the values would fall somewhere around
L=97
A=1.4
B=90
I never noticed this before and was wondering if there is a problem with my software or spectrocolormeter.

Would this have anything to do with optical brightners present in a paper? The reason i ask is because i took some measurements of different papers after i noticed this and it was doing the same thing with a canson paper (canson baryta, which is similar to the ilford paper), but not with a hahnemuhle paper that is oba free (as far as i know).   

p.s. after measuring it several times and getting the same results for the 0 patch i went ahead and linearized the curves and the outcome seemed fine.