Notice three match–the ‘twist’ is on Main Character. That twist shows up in the PSR also, where Psychology is matched against Psychology. The authors talk elsewhere about the model being from that perspective so there are some predictable distortions.
Notice in this case the ‘distortion’ is an ‘off by one’
I wonder if this is the ‘tension spring’ that winds up the model, and if you can wind it tighter - perhaps off by two, or three? @jhull