independent health for enemies

I there, I am stuck in a problem that I cant solve. Whenever my mouse overlap an enemy, it show is health, when enemy is hit the health bar decrase in function of the bullet type and enemy type. But when I overlap the enemy the hp bar goes to an other enemy (same sprite ID). the health bar is not independent to each enemy and the health variables is. for more explanation tell me.

sorry for my bad english

dropbox.com/s/nmexgemhwfzid6z/help%20please.jpg

AnD4D If you want to help me

Half of the problem solved!!! I use containers on my sprite but whenever an enemy die, they spawn on (0,0) (its raining robots!)

Ok problem solved,when objects are in a container they don't need to be spawned, just spawning the 1 object that the other is linked too will create the seconded object.

            -condition___________action

             robot on destroyed--wait 2 sec

                               --create obj:robot on layer x at (x,y)

the problem is here,I delete it--create obj:health bar on layer x at (x,y)

please refer to the jpg on the dropbox link at the first post