hey Corvys,
Yeah this is something I've run in to as well and I can't quite determine the source of the issue -- it seems to be a little different depending on browser and (for some reason) OS. Something about the margin calculations, I think, but I'm not sure.
I'm planning on incorporating a PDF renderer in the near future and reworking the print feature to just print to a PDF that should render the exact same regardless of browser or system. Not sure on an ETA yet, but it's definitely in the queue.