It may come as a shock, but:
1. Humans make mistakes.
2. Rock stars are humans.
3. Rock stars make mistakes.
Elton John said Fred had written 'The Show Must Go On', Sinatra said his favourite Lennon & McCartney song was 'Something', Roger Waters said Freddie was English, Freddie mixed up the title of an Aretha Franklin song, etc.
Not to mention that many rock stars (Brian, Roger, John and Freddie included) have made mistakes about their own bands. So: do you expect Morgan to be infallible about Queen trivia?
John hated HS. Frederick's favourite singer was not PR. Roger didn't compose 'Innuendo.' Witness testimonies are often inaccurate. Scotland's not in England. 'Bo Rhap' hasn't got 180 voices.