How do you double your furniture on zwinky

well the way you do it is kinda difficault.it may work and may not. ok well you go to furniture and you click on what you want anything. and then if you want to doble it you go to another piece of furniture and kinda forget the one you want to double. then after awhile the furniture piece will be un clicked and you click it again and there its doubled! sorry people if it didnt worked it worked for me so ya.