If it's anything like the P2, it's normal. The motor on my P2 isn't solidly mounted to the base. It's suspended in place by a rubber band, thus free to move around.
If yours has a cover over the motor held on by screws, you can remove it and see the motor and how it's mounted.
If yours has a cover over the motor held on by screws, you can remove it and see the motor and how it's mounted.