Some emergency fittings give you the choice of maintained or non maintained in this case they will be 5 terminal - Maintained+N+E+Sw Wire+Non Maintained, the live wire going into the choice of terminals. Usually they are purchased as maintained or not, therefore 4 terminal L+N+E+Sw Wire, Live...
If you are using normal filament lights then that can cause problems as they are designed to hung. When using them in wall lights, if they stand upright, the heat burns out the filament. This is why wall lights usually use candle style lamps as they have been purposely designed for that use. As...
Best to get an electrician to test it. RCDs are notoriously sensitive and if they are constantly tripping then you could have a fault. even a low voltage fault which could only get worse