Objects on the dedicated objects layout do no need to get destroyed, in fact, you shouldnt.
On the other layouts, remove the instances in cs2.
And then, when you need to have one of the objects which are in the objects layout on any other layout, simply spawn or create a new version of the given object on the required layout, leaving the object on the objects layout in tact.
You should keep those objects there at all time, throughout your game.
after you created or spawned your object on another layout and have no more need for it, destroy that object in your layout (not on the objects layout)