Thanks for posting the pics. I'm not sure you aren't getting some damage there. The photos show a darker spot near the edge where you are cutting the paper even after the single cut. Doing the math and using the scale from the electron microscope photo, his damage looked to be about 3-4 microns from top to bottom - on your 500x scope that would work out to ballpark .059" - .078" in your image if it was the same size as his. That dark spot at the edge sure looks pretty close to that, even in the first photo of the single paper cut. You may well just be repairing the edge enough by stropping post-paper-cutting to get a shaveable edge. I think it's not possible to say for sure at that level of magnification though.