Polypaint Does Not Project Properly Zbrush

supermoby

I'm projecting from the lowest levels to the highest, but I'm encountering a problem in that the polypaint does not project through properly. I'm getting "blank" polygons that I can't paint to. Note that the white polygon should be blue (see attach). I cannot correct it by painting on it either as it doesn't seem to accept color. What exactly am I missing...

Thank you