I want to clarify what the place command is and what is expected of a dog while they are on it. Firstly we never associate stay or any positions like sit or down to the place command. Lets say for instance I associate the sit position to the place mat, my dog will be thinking about a command instead of relaxing. After some time I may have even forgotten that my dog was in a position, the dog will most likely fall asleep or lay down to get more comfortable , in that process the integrity of my sit will also be diminished. Place is its own behaviour. The dog should understand it as a boundary , but they should feel completely free to move around or get comfortable within that boundary as they please. Meaning they can sprawl out , turn around , or lay on their back as they choose. Never polluting the idea of commands.