https://forums.macrumors.com/threads/1519966/I would recommend having different IDs per person, as it'll make life much easier. But, the big downside is that you'll have to buy apps separately (no sharing on multiple devices.
And also
You have already purchased this item but it has not been downloaded. To download it, select Check For Available Downloads from the Store menu.
How do I select "Check For Available Downloads" from the Store menu ? I don't even see where teh Store menu is.