Just make sure you're consistent on where you nock on the string. Your POI will change based on if you have the nock resting on the bottom knot or against the top knot. I recently discovered this while trying to sight in my new bow sight and was chasing my tail because I would shoot high, move my sight up, then too low, move my sight down, high again, tiniest of sight movement, way low.
I started thinking I was getting vane contact or my rest had gone out of time, but all of that checked out ok. Then I checked my nock point, and I use nocking point thread inside my d loop to create a nocking point. The top thread had come off, assuming I didn't burn the knot down properly. So when I nocked an arrow, sometimes it would be nocked high, sometimes low, changing my POI each time.
BT