And when you do get your rest get it at a pro shop and have them look at your bow. It is also possible that your cams are out of time. And 6 years on a string! You should definitely get new string and cables.
If you don't want to spend the money this year you will have to do some tweaking on your own by moving your rest in accordance with the broadhead tuning method on the previous posters suggestion of the Easton tuning guide.
Your bow is out of tune plain and simple. And I think too that your arrows are underspined.