Forgot to discuss the Catalyst aspect. The Catalyst process predates Calypsos, I'm sure. Calypsos are touted as having Catalyst action. The initial fill is neutral (no nutation, spin, or recirculation) to flush the detergent dispenser and fill the pump sump to satisfy the water level pressure switch. Then recirculation starts with spin at 60 RPM or nutation depending on the cycle. The wash/detergent solution is highly concentrated at this point. Fill immediately resumes until the water level is again satisfied, which slowly dilutes the wash water to "normal" concentration.