Bill Berloni states in his book that those associated with the company suspected the producers intentionally hired Joanna, but always planned on using Brittny. The theory being that the producers hoped the change of Annie's would create (positive) publicity just before the Bway run. Just like 1976. However, in 1976 NO ONE knew that Andrea wasn't the original Annie. And, in 1976, they weren't even at their out-of-town tryout. They were still at Goodspeed. In other words, the switch was so early in the run that there wasn't any publicity.
The whole Annie20th debacle was ridiculous and those involved have to live with their decisions.
But does anyone know what Lyndsay did after Annie? She played Tessie and became good friends with Joanna during the tour.