I think you should post pics as soon as you are able so we can see what your seeing. My car is a DD and is swirl free, only thing I think I do different than you is when drying i never let the black thread on the drying towel touch my paint. Its always folded up, when it gets soaked I unfold and refold to a dry part. But the guys are right touching your car, your going to at some point swirl it up. I have reached a point where I am seriously considering the Master blaster to eliminate me having to touch the car less after a wash. To test your method do as the guys said, do and IPA wipe of a 2x2 section of the hood and start with the orange polish and make sure you see the polish flash (turns clear) once you see that stop. Possible your still polishing after the polish has already been broken down.