hi, 1. yes, it is intended that every scene gives perversion only once. We want to avoid every kind of grind in the game. Gaining perversion should always include story progress/new scenes. I will try to reduce/remove the displayed max perversion to avoid confusion
2. This is intended. I thought it would be cool if MC could blow him again and again.... :D But maybe this will change. The mage quest needs some revisions anyway.