Benissimo Absolute Black granite tiles

I've tiled my kitchen countertop with Absolute Black granite tiles manufactured by Benissimo (www.benissimosystems.com). The problem is that they stain a lot - we have rings, partial rngs and spots in couple of places already (after ~2 months). I followed manufacturers instruction which was to seal with pentrating sealer. I used StoneSpecific's grante sealer - http://www.jamoinc.com/body/products/care/navLeft_penetratingsealers.html. I am confused becasue i found some sugesstions on the web (http://www.findstone.com/curegran.htm) that such granite should not be sealed and it's the sealer that might be casing these rings/spot. These spots are not moisture spots becasue they are lighter than tile (they are really bad when looking at an angle - you can see light reflecting differently on the rings/spots). Is there any way to remove them? What would you suggest? Thank you. Dawid.