Please correct me if I'm wrong, or if anyone has more detailed information, but as I understand it:
Felicia Boswell had a supporting role in the show originally. She played "Freda," who later becomes Josephine Baker. She had a whole number/sequence in Act 2 showing her rise to success. It seems that the character and entire story tangent were cut, and as a result, Boswell was out of a job. I remember the same thing happening to some actors in Spider-Man. In retrospect, I'm surprised they didn't offer her a role in the ensemble. Although, maybe they did and she just turned it down. In any case, it's still a legitimate Broadway credit for her to put on her resumé, as she did perform the role on Broadway. But at the same time, the role was not in the show in its completed form, nor was it in the Playbill after opening night, which I'm guessing is why the Playbill Vault doesn't have it.