Have you tuned the bow other then the pendulum? It really doesnt matter what sight you put on there if you have another tuning problem. Sounds to me like you may have to move your rest slightly to the left. Have you checked centershot?

I would paper tune the bow to make sure you are getting good flight first. Then, shoot on the ground and get good groups with a fixed sight. This will enable you to make minor adjustment to the rest if you need to, to get it all together. Then try the pendulum once everything else is in order.

I shoot a pendulum sight also, and this is how I do it. I have had good luck doing it this way.

Hope this helps