Hi Dezue,
So here's the deal:
Platform Builder allows different sized game windows and different sized views. Because of this, a setting is enabled to blend pixels together. If this setting was turned off, then any math that doesn't even out would cause some pixels to double up while other pixels remain single. You'd end up getting really weird effects.
One thing that I would like to look into is the possibility of disabling the pixel blend feature when the math does even out. I'm hoping that I can find a solution for this in the next version. No guarantees on this, but I suggest you hold out for a little longer.
Best,
TingThing