Scott never left Maddie and Nate for Jean. Besides thats a moot point as Lorna was possessed by Malice during that time. He also never cheated on Jean with Psylocke.
IA with Lorna though when that issue was written. Scott was more likeable in the 60s/70s and later 90/early 00s when Lorna was around him. The character changed after he got with Emma and I could see why she didnt like him