C3 Says Last Instance of Object - But its not

I have an object which is instanced in 2 layouts.

When I try to delete one it says that this is the last instance of the object. ANd it goes on to delete it in both layouts.

Is this expected behaviour? I want to just delete the individual occurrence in a single layout.

Thanks

This object is probably on a global layer.

Yes it was. Thanks for that ! :)