Stop overstuffing the machine! Place the laundry in so it is balanced. If after agitating, most of the clothes are to one side it'll spin off balance and make the bagging noise you hear and cause the machine to walk all over the place.
How Can I Fix The Loud Bangging Noise My GE Washer Makes When It Is In Spin Cycle?
Try to balance what is inside, especially if you are laundering rugs, towels, tablecloths, etc...