cheats working all strange

[pmurray67]

I am trying to use some cheat codes for star ocean first departure, but most of them ether do not work or send my attack power to like 10 million and my defenses to -50k, on whoever is leader at the time. Main cheats that are doing this is million money or any that changes hp/mp. Other codes for like fast xp don't work, while others like unlimited sp works.