This 1.4 Dynamic GP its rear wiper motor starts when the engine is started and does not park in the same place every time, does anyone know how to resolve this?

How is the motor parked, we tried changing it but it does the same, so either it is a fault shared with both motors or its parking position is controlled from elsewhere. any answers appreciated.

Do you mean that the rear wipes starts with the engine regardless of the switch position? It will only park if switched off, not if you kill the engine, so could it be that the switch is broken?