Is there a way to destroy a specific instance of the same enemy?

Here's what i did:

>projectile on collision with Weakpoint:

pin projectile to Weakpoint

wait 5 seconds

Destroy projectile

>every 1.0 seconds:

>Projectile is pinned:

substract 1 from HP

>Weakpoint HP <= 0:

Destroy Weakpoint

My problem is when an enemy is destroyed, it proceeds to destroy every enemy on the layout, and for the odd projectile pin i did, its to make a damage over time mechanic, but it dosent work too lol, but thats not too bad i will fix that myself, i just want to know how to destroy one instance of an enemy rather than all of them.

As I explained in your other post, you need to pick the enemy instance. Picking is very important in Construct. If you don't pick the correct instance or instances, the event applies to all instances.