I'm guessing it's a duplicate of the smart objects on screen/add/overlay mode and mirrored. Basically unless you say otherwise (by doing 'New Smart Object Via Copy') embedded smart objects will be instances of each other, i.e all duplicates of the same embedded file. So change one, change them all.
A bit like having more than one linked smart objects linked to the same external file.
ah i see so if the object was copied, flipped and faded off then the change would propagate through all copies. I hadn't thought of that.
thought it might be some fancy scripting/droplet ju-ju.
I'm guessing it's a duplicate of the smart objects on screen/add/overlay mode and mirrored. Basically unless you say otherwise (by doing 'New Smart Object Via Copy') embedded smart objects will be instances of each other, i.e all duplicates of the same embedded file. So change one, change them all.
A bit like having more than one linked smart objects linked to the same external file.