Board Thread:Rewatching "Merlin" - Season Three/@comment-5102537-20131019114834/@comment-216.177.129.73-20131024134409

Under these circumstances the knights weren't even real knights. Arthur had no right to knight them because he was not prince of Camelot anymore the moment  Morgana took the throne. She was coronated by Geoffrey, hence the ruler by law whereas Arthur was only a noble on the run. His only legal right to knight the commoners was when he was King or the Prince regent.

As long as Morgana had the throne the commoner's knighthood was legally null and void and it wasn't more than just a symbolic gesture.