Digital BW, The Print

Hello,

After calibrating two Samsung monitors, one 22" and one 30" with 
GretagMacbeth Eye-One Match 3, I've noticed that when displaying a 21
Grayscale Stepwedge, there are still traces of red in a some of the
wedges. 

Another run at calibration was undertaken with BasICColor trial
software. Same results with the stepwedges.

Is this something expected of LCD monitors, or is there something I'm
missing?

TIA,
Andre