wma54p leaking problems?

Can anyone please help me?
Our Wma54P is leaking badly. Firstly it started off with the drum just sticking all of a sudden during a cycle. I replaced the motor carbon bushes. Then we had problems with the rubber door seal (I noticed small hole) which I also replaced. Now for some reason when I put it on 'rinse & spin'. It fills washing machine up to the point of spilling out through door and despense drawer! I have taken all the hoses off (filter and small pipe from pressure switch) and cleaned them totally up with no obstructions there is no obstruction with pump or filter either. I've been told the Pressure switch itself could be the problem now or the Drain pump. Can anyone advise me if they might know of anything else it could be? The Pressure switch & drain pump were fine before all this trouble with the motor. Can they just go wrong like that????