Idler wheel lean is normal in some bows. Make sure you know what the bow is supposed to be at. For example. When adjusting the lean on a Legacy mathews suggests that the string is parellel the outside left edge of the wheel as you look at it from behind in the resting position. However on the LX the outside left edge of the wheel should bisect the string 4.5 to 5 inches down the string in the resting position. I found out the hard way when I shot the LX because I was wearing servings out fast. I went through a winners choice string in 2 weeks. OUCH!!!!. On the LX the string will actually be coming straight off the idler wheel at the full draw position with it bisecting in the resting position. To check the lean correctly the bow must be at full draw. About the only way to get a good check on it would be by using a device such as the hooter shooter. I don't know what bow you have but I am sure that all of the bow companies have heard questions such as these. I would not make any adjustments until I found out what the bow specs are. Some bows allow for some limb twisting.