Forum:Moving out but keeping everyone in the game

Okay So I have Sims 3 for Xbox 360. I have a family where the parents are elders, 3 kids are young adults, and there is a teenager. I want to move the young adults out and control them, but leave the other three in the game. How do I do this? I try to move out with the cell phone or computer, but it doesn't work because they disappear. From what I heard I should see two screen when I move and be able to choose the active family. Instead I see one box with three columns: My house, New house, and kick out. Putting people in my house does not leave them in the current house even though it sounds like it should.