hntr...It could possibly be you are using an improperly spined arrow.
Here is what I do and I get very good results. And I don't use lasers or any of the other 'new' tuning gear. I initially set my nock set so my arrow is dead square with the string. Then I nock an arrow and align the tip of the arrow, the string and the center of the limbs.
Now I may shoot thru paper the get the smallest hole I can. But most of the time I am pretty close.
I will go shoot the bow at 10 yds to set my 20 yd pin. Then move back to 20 yds and sight in. Now if you have the distance, using ur 20 yd pin, shoot arrows at 10, 20, 30 and 40 yds. Ifeach of these shots felt good to you than the arrows should be in a fairly straight vertical line.
Next, get your broadheads out and tip 2 with BHs and 2 with FTs. Shoot them at 20 yds - 1 BH and 1 FT at each target dot (Tip: shoot the BHs first so you don't damage the vanes on your FT arrows.).
Now adjust your rest in small increments (about 1/32") chasing the FTs with your BHs. (example: if your BHs shoot left of your FTs, move your rest to the right.)
And only do one adjustment at a time. If your BHs hit high left, adjust the rest to the right first until you get the arrows vertical. The begin to adjust the rest up or down as needed.
Note: once you get both hitting the same POI, move back to 30 or 40 yds and shoot them again to super fine tune your bow.
Sounds complicated but this whole process should only take less than an hour. And you will be completely satisfied and confident. And the deer will be scared to death!

Read the first 2 posts in this forum. They are very helpful.