My washer is misbehaving again. This time during a wash cycle it started making a loud grinding noise. I stopped the cycle and found the clothes all tangled around the center post. I pulled them all out, drained the tub and didn't find anything lodged under the agitator. I did some reading and found that agitator dogs can cause the top part of the agitator to slip and not turn properly so I replace them this morning. The problem didn't go away. The bottom half of the agitator turns powerfully, but the top half is lethargic and even starts to turn counter-clockwise. I can stop it from moving with my hand. Here is a video of what it's doing. Any ideas?