Flyingstone you are confused with autoflight limitation and what the pilot yourself is actually doing .
If you are disconnecting the autopilot at 80 ft you are doing a simulated CAT 2 approach with manual landing.
Well quoted "If the flight crew performs an automatic approach without autoland, the autopilot must be disengaged no later than at 80 ft AGL.". This appears under ILS CATEGORY CAT 2 on FCOM limitations.