It's not because it's a single cam (all bows with a cable guard exhibit some degree of cam lean regardless of cam design; some very little and some pushing upward of 3/4"). It's just that with a single cam you can only correct one end by adjusting the yoke and that's the end that really doesn't need adjusting (since it's an idler wheel and not a cam). I wouldn't sweat it. My Old Glory leans about 3/4" and still tunes and shoots broadheads with consistant accuracy out to 60 yards and probably more if I could do my part...