Think of what the results would be if the cam is leaning in relation to the nock travel and you can see the problem. Installing the strings and cabels wrong is often the cause. On some bows installing them according to specs will cause it. Mine is like that. I keep my a/a an 1/8 to 3/16 longer to keep it from happening. Don't assume that they are ever done right. Really does take time to get them right and most are not willing to do it. A press is almost a must anymore.