Alright, this has been an ongoing problem for over a year now and it is easy to replicate. In one campaign create a character sheet DnD 5e, give it vision, maybe even dark vision (this works even without this but I am stating it so I am not told to "toggle sight on and off!" we've done that, it's happened, it is broken either way) then you create an NPC DnD 5e sheet. The first sheet is the player and the second is their mount, usually a warhorse. You can even port it in with the compendium if you want to closed box this as much as possible. Now you give a player control over both sheets. That player then fetches those sheets and/or copies them into a second campaign. In the second campaign the mount will ALWAYS be on top of the player. The DM will click "send to back" and/or "send to front" and it will do that for everyone except for the player who controls the sheets. It is fairly easy to see how this becomes frustrating. So? How do we both have the player controlling their PC and their NPC Mount while in a secondary campaign without layering problems?