[aphid]

I used to teach this stuff...lots of lazy people would drop multiple objects on the same layer with the base image. You have to physically tell it in PhotoShop and Illustrator (for example) to create a new layer for separate objects.

[D-fendr]

I used to teach it also.

Is the theory that an incompetent ignorant user forged this?

I don’t buy that because he/she wouldn’t have ended up with this result - it would look like our student’s work. :)