Bug or Update for the garden my sims

I was playing my sims on my switch. I went to my garden, in my previous play through I built empty houses and had furniture in them. When I went back, I tried to move in a sim. I wasn't able to remove them once they moved in so I exited without saving. When I went back I can't build houses anymore. I only had the option to edit and delete them. When you walk up to an empty lot it just shows the inspect icon and it says looks like you should move someone in. I thought you couldn't move sims into you garden but it let me. Now I can't build the empty houses anymore. I deleted all the game data and uninstalled and reinstalled the game and started over. I still can't build the houses in the garden. Is this a glitch or update?