If you are trying to stitch the fabric the way it is loaded on your poles in the picture I would say that is one of the problems. The back pole that is under the machine needs to be wound the opposite way. Your fabric is way to loose. Probably your front pole is suppose to wound the opposite way also so that you are quilting 'in the well'. Here is a pic of my set up, it has the back pole the way yours should look, but I choose to have my front pole different. I float my batting and top so that is why it is looser than the backing.
Just the backing loaded
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All 3 layers
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