If you get a different attribute (like Stamina), without saving and try again.
Use Layups instead of Dunks to save time and get a higher "Time Bonus". Nba 2k12 Cheats Ps3 My Player Skill Points
If you want to earn points through gameplay, focus on your rather than just scoring. If you get a different attribute (like Stamina),
Go to Settings > Gameplay and disable Autosave . Nba 2k12 Cheats Ps3 My Player Skill Points