I've noticed many times that chartread with i1Pro may misread patches when there are non-contrast or too narrow spacers between patches. It likely may took a place in the case when there was no right preliminary profile for *.ti2 data and printtarg places patches unoptimal way. Another reason to misread may be a blank paper strip between patches and sheet edge if the edge is crossed by instrument while reading. In such case the strip cut off straight on patch column edge may help.