I'm not talking about low level monsters but the ones that were already 'hurt', or has their health points already decreased. There are times when I attack a monster and I see myself fighting an already weaken monster. I'm not complaining or anything but I'm wondering why there are cases like that... Are those monsters previously in a battle but the player fled or something?

i dunno - but it sounds like a good game :D

Maybe its because someone had already battled with them and then had to flee since they will eventually lose the battle, that's my guess eheh.