I work at the BL and can confirm that the Sound Archive references are for vinyl LPs only, not master tapes. I've seen the records myself, for what it's worth. The different song titles are most likely the result of a cataloguer's attempt to cross reference songs, to give them a 'uniform title' in library-speak. Regrettably there have never been adequate resources to do this properly, so the Sound Archive's catalogue isn't all it could be.