I have an idea that might help this game function better. I think the game creators need to add a Refresh button somewhere on the main page. I'm not sure if anyone else runs into this, but the game seems to get "stuck" where it is, and doesn't process any progress made or completed quests. The only thing that seems to work for me is to shut down and restart my tablet. Obviously, this is inefficient and a bit annoying. Adding a Refresh button could reboot the game, without the need to reboot my whole tablet.
This might also help with the duplicate items issue, as well as the issue where buildings disappear after being moved.
Customer support service by UserEcho