Did you pass all the rolls when you studied the topics? A clear sign that you had studied all is that the MC doesn't panic during the weekend at night. If you did, then it's a strange bug. And to unlock all the spanking scenes, the key is to unlock the ladies room. It can only happen after the third week, when you the little dude can make the holes in the bathroom's door and window. There are 3 big quests in the game, and not completing them, will make you lose the final fight against Evil-Lyn.
1. Clear all the enemies in World of Spankraft in the 3 levels.
2. Rise virtues higher than flaws.
3. Befriend the 3 girls (Ms. Schumann, Greta and Tina)
This game will get a massive update and patch at the end of the year.