The reason seems the following:
I divided "Dump Switch On/Off" into two orders
{ down = fuel_commands.DumpSw, up = fuel_commands.DumpSw, cockpit_device_id = devices.FUEL_INTERFACE, value_down = 1.0, name = _('Fuel Dump Switch - ON'), category = {_('Left Console'), _('Fuel Control Panel')}},
{ down = fuel_commands.DumpSw, up = fuel_commands.DumpSw, cockpit_device_id = devices.FUEL_INTERFACE, value_down = -1.0, name = _('Fuel Dump Switch - OFF'), category = {_('Left Console'), _('Fuel Control Panel')}},
It worked well two weeks ago. But I found a double binding today. Do I some mistakes in the above orders?
Thank you very much!