I was watching the follow up to the Turning Point special on the 20th Anniversary production of Annie. The narrator said that when Joanna got bronchitis, they tried out some of the other orphans to find a new understudy, which was how they fell in love with Brittny. But I'm confused. Didn't Joanna already have an understudy named Alexandra? What happened to her? Did she leave the production for some reason? Did she go on for Joanna at all while Joanna was sick? Could somebody fill me in?