Well that's no good. I never saw the lo ohm warning until I started wrapping the kiss myself. I wonder what was different. Maybe our iris reads different. My fluke dmm reads 2.2 ohms on my self wrapped kiss, but the iris says 3.3 when screwed all the way down and 1.8 when unscrewed back slightly from all the way down
most likely your not using non resistance wire to connect to the coil.
what could be an issue is when you screw it in, the center pin moves and bends the wire enough to touch the shell of the kiss cart, causing the resistance to change.