oh, OK. I think I was doing something strange maybe. See, I was stacking the images on top of each other to make a group. To try to make Dynamic Lighting for the Dark Vision guy and regular light for the human. So, I made one lantern to emit light radius 20 for all players to see, and made one to be controlled by Dark vision player 60 feet. I was grouping them to be one lantern. But when I was single clicking on the stack, one lantern would move. But it did not maintain any sort of group. I just tried again with the lanterns side-by-side and see that they stay grouped after selecting Group. But also, oddly, I just tried single clicking the stacked lanterns again and...they both move. Rather confusing. However, it seems as long as I double click, it does move the stack without error thus far.