The up and down part would be a poor serving job. Rotation is usually a symptom of string stretch. To fix that, you can put a good string on it (talk to 60x about that), or you can use a peep that has a piece of tubing on it that straightens the peep out when you hit full draw. If it were right before season opener, I'd go with the peep as a quick fix. At this point, you still have plenty of time to put a new string on and re-tune everything, so its all up to you. A good string is pre-stretched, so it shouldn't need any extra time to settle in.