Where did these other 500 Series come from? I just started using my new Kenmore 500 Series washer. About 6 loads. First load took me 10-12 min to untangle a pair of tennis shoes from the rest of, nearly, the entire load. I have never done anything unique with my prior washer, which was a Kenmore model...I think it was over 30 years old. Couldn't even find a year or model # on it. Wasn't sure I could get the water pump replaced. This new machine is noisier. I thought they used better insulation or was I supposed to pay another $200 to... read full review »