How did you not get an enormous number of misalignments with how similar the seating areas are? Is it similar at all to like a hallway in a hotel where if everything looks the same you can't make much progress?
The pro3 generally does not have a lot of misalignments, I got some, but i kept the scan points close so that helped avoid a lot. I also used the manual align a few times.
Can you link to a more detailed area of the stadium....like the coke bottle...then have many scans around that area that capture the bottle..say as if you spent a few hours on the bottle itself getting a very detailed scan...?