Check your book on how to set the grain loss monitor. I believe (without looking) you have two knobs on your overhead monitor. One of them is to set the sensitivity for different grains (more sensitive for small grains, less for corn or beans) and the other one is to set your acceptable loss - in other words, you drive a ways, check your actual loss, and turn that knob until your needle is centered in the display going the same speed as you were before you checked if your loss is acceptable to you. As for these rotaries, I don't think too many people trust the loss sensor for the rotor. All it takes is for a piece of straw to get stuck in the cage touching that pad and it will give false readings. I don't think ours even works at all anymore. We just set ours to watch shoe loss rather than rotor or combination. I've always thought the rotor loss sensor should be placed under the grate below the discharge beater too rather than the stock placement. I'm thinking that you just need to tweak your sensitivity if you have already proven that the pads are working. Yes, they look "tucked under" the back of the shoe, but they do work in that position once you get everything set right. That, and set it to read show loss only - if your rotor loss sensor has quit working, it will cause your total loss to be lower than actual.