When they were back to work, the doors were closed until all of them arrived, as he was emphasizing he had the upper hand. It is explained "that they were not sulking, that their mouths had been closed, they had to take it or leave it, and that anger and helplessness sometimes hurt so much that you can't even cry out."
When they resumed work, the entrance remained shut until all members had arrived, as he stressed his dominance. It is clarified "that they were not pouting, that their lips had been sealed, they had to accept it or reject it, and that anger and powerlessness sometimes cause such intense pain that you can't even express your emotions."