The goals that you describe have been caused by players at the front being out of position, forcing everyone in the line to have to move in one to cover whats in front of goal. That leaves the man at the back post looking really stupid. But its not their fault. On one occasion it was Casey that was left high and dry at the back post and he quite rightly went tonto at his team mates.
Im hoping putting Butcher back in there sorts that problem out. He is clearly a talker and an organiser. We need that back in our defence.