HP deduction problem

I have this strange problem, when i attack an enemy, it does much more damage than i have set. for example, a simple punch does 2 damage, and the enemy has a max HP of 50. in just two punches, the enemy is destroyed. any advice would be appreciated.

Can you take screenshot of your event sheet?

Maybe you should trigger once when decrease the HP of enemy.

I think it might have something to do with the overlapping condition being fired too many times.

Have you tried on collision with?

thanks guys.