I'm sure someone can help you. At least you know it's not right and trying to find a solution.
The LAs in my guild are always complaining about tension/thread issues. Rarely do I see any of their work that doesn't have thread bumps, loops, or too long a stitch, in with the good stitches. I have suggested they take a machine quilting class for a long arm machine but get the
oh those are too expensive and I'll have to travel an hour away. 
So stop complaining about it then. It seems they are so happy that most of the stitches look great that a few oops are okay. I let them quilt my utility quilts.