I am right-handed too, but i find some spins easier to do with my left arm on top because that arm is more flexible (like reverse grab and pretzel). I think another reason might be because we may grab the pole too tightly with our dominant hand, so we don’t spin as much. However, your pole shouldn’t unscrew either way you spin. i have an xpole and don’t have this problem- and i spin counterclockwise alot. If you’re sure it’s unscrewing/loosening maybe you need to tighten it?