Bolt Explosion Flow - Not Working

Hi All

I am having trouble with creating a Bolt Grenade/Explosion

I was trying do the following

1. wait for 3 seconds
2. instantiate explosion
3. use overlap sphere to collect all objects that's hit and assign to a scene variable list
4. apply force and destroy

The problem I am having is the following

Of the 5 objects that's in the scene

1. Only 1 object is being destroyed but all three objects in range are pushed back
2. the two that are not in range are also added to the list and the grenade object

If someone can help me that would be greatly appreciated