1. If you turn off the pump and they go down, then that is probably a module. If they stay up, then that is a nozzle.
  2. If your system is PV3 and you have a salt pool, then the nozzle staying up could be a gasket on the nozzle that salt can attack and make soft and sticky. Remove the nozzle to inspect and replace the gasket if it is interfering with the nozzle. Part number 005-627-0060-00 for a pack of 4.