3 Float Switch System, Residential Pump Station, to Force Main

- Siren/alarm went Off - Lifted Lid, effluent nearly at top (last time pumped it appeared to be around 8' deep, 3' diameter, if I recall) - Opened electrical, flipped switch from AUTO to MANUAL, level of effluent started dropping quickly - Ran until effluent was below the third float - rinsed everything well - flipped switch in box back to AUTO, then tilted lifted the float with shovel head, still no pump start I expect the top float is the siren. My pump obviously works, so must be a ad float switch. I bought a Lowes $20 Piggy-Back Float Switch. It appears to be for a one float system?, mine is two, minus the alarm. Questions: