I used to sew garments and used pinking shears to keep fabric from raveling. If you can do that in garment sewing, I thought why not use a pinking blade for cutting my pieces to make quilts. Also I can not stand the raveling strings on the back of the quilt top when you use a regular blade. Using a pinking blade has worked out well for me. If you cut everything with a pinking blade, it should match up. You will have to change blades more often so that your blade will be sharp to cut through multiple layers. I watch ebay for good prices. I do not buy the off brand ones, only Olfa that fits my rotary cutter. I have not had a problem with the cutter jumping over the ruler, but I am always careful to make sure my fingers are placed well away from the cutting area when I hold the ruler down.
Pat in Arkansas