I have never ever come across a bow that tunes with a level arrow. I always initially set up a bow with a nocking point about 1/8th" aove square. Almost all bows will tune with a nocking point 1/16th" to 1/4" above square. The older the bows are the higher the nocking point. They tune this way because the nocking point is not in the center of the string (cam to cam/wheel) and most bows do not have level nock travel to begin with. Dual and binary cams have a more level nock travel than most single cams.

Many times if you hook your release below the arrows nock instead of a loop you will actually have a nock low tune.