It does have to do with aligning the blue sewing area. I had a few struggles with that too. My mistake was not making my initial sewing area big enough to begin with. I made it too close to the size of the actual quilt. You can test where each row will begin before actually sewing the whole row. I also found that my tension was good, but seemed to change once I applied the robotics. Just something I need to learn yet.
I did find my dealer to be so helpful walking me through it on the phone. I have called the abm headquarters and they were super helpful too.
Enjoy the process, the best way to learn and remember it is to fail along the way.