To quote the wiki:
[quote:uj3k7n3q]When Spawning one object in a Container, new instances of the other objects in the container are automatically spawned and paired up.
In your EnemyMechanics event sheet you do create both though, the enemy solider itself AND the hitbox. This is resulting in the double amount of enemies and hitboxes you intend to have. And will eventually lead to some kind of mess.
Just spawn only the enemy with the event and set the hitbox always to the enemy position. This should result in correct behavior.
And welcome to the forums btw!