Seadoo uses a floating drive shaft. With the pump off... the shaft will move several inches in any direction. Even when assembled correctly... it will move back and forth a little.
The shaft, and alignment have NOTHING to do with wear ring issues. The pump is self supporting.
The carbon seal is also floating. SO... it will move if you push on it.
As above... keep it all on one thread, so you don't get redundant info, and responses.