object placement

Hello everyone :) I really need help! Objects placed with the Mapkit tool will disappear after the game is exited and restarted. Unfortunately I don't know what to do. Does anyone know the solution to this problem

When placing any objects on the switch the grid doesn't line up with where the object is placed. This has so far happened on my farm when placing a building from robins as well as in the museum when trying to donate items. It's off by at least 5-6 grid spaces on the farm, not sure about the museum.