I have a pretty new Polaris 65 that we bought last year. We had an old one we used for over 10 years, so it was a no brainer to get another one.. The new one goes in circles. I cleaned out the filter in the disconnect, and took the cover off. The little ball goes back and forth between the back two ports, but not to the front ports. Also the white tube does spin freely and plunge in and out, but it doesn`t spin constantly, just when Polaris moves forward. I`m wondering if the little ball is suppose to be going to the front ports as well. Thanks for any help.