I honestly have no idea but I wonder if the yoke was not pulling evenly on the idler wheel (is that what the top wheel is called?) causing a very slight lean if that could create this kind of problem. I have seen that checked with a spot hogg laser when the bow was at full draw and putting one twist on one side of the yoke corrected the slight lean and a slight tear in the paper. I am thinking if all you did was correct the slight tear in the paper by adjusting therest that maybe the slight lean of the wheel may affect shooting at longer ranges where small things become so critical.