The method of holding the brake lever and tightening the caliper bolts rarely works properly for me. The tightening of one bolt, while the other is loose, causes the caliper to twist from the rotation of tightening the bolt. It can work if you lightly snug up both bolts before tightening them. I have had much better success with eyeballing the caliper to have an even space on both sides of the rotor. I just tighten the bolts to the point that there is some tension on the caliper, so I can move it but it stays where I put it. Then I tighten the bolts completely and test.

If it keeps rubbing on one side, that usually indicates a stuck piston. I just replaced one of those calipers on my bike after less than a year of use, because one of the pistons cracked.