>>723403294
They probably both seem a bit two-faced because Albus and Sion are pretty tight-lipped about their past. Albus's parents and Sion's oldest brother Visha were both a part of the old Silverlining troubleshooter company but they don't acknowledge it at all between each other.
For Sion I think it's just because he's the type of guy that doesn't like the dwell on sad things, but we do see Albus being coy several times throughout the story about his motivation for running a troubleshooter company and he does tend to put up a polite facade towards certain people despite his personal feelings towards them. It's probably not anything actively malicious but he's not real honest either.