Lucius had received many complaints about the deputy headmaster position, because like expected in the last year Minerva was so overworked by her position that there was no other solution than to split up the deputy headmaster position into two. Minerva would remain the first deputy headmaster, but the second position would be given to either Promona Sprout or Filius Flitwick, but Lucius believed that the latter would be chosen since Filius was in Hogwarts since Armando Dippet’s time and Promona taught in Hogwarts in the same time like Minerva. Minerva was deputy headmistress, because Albus had chosen her personally.