Ian,
# 10 isn't the original green.
It was substantially altered years ago.
It used to be much steeper.
However, increasing green speeds made it almost unputtable and unrecoverable.
While the steeper slope accepted tee shots more readily, putting and recovering was becoming very difficult.
The current green doesn't accept shots quite so well with the same club, but, with high tech the incoming trajectory is becoming steeper and steeper with shorter clubs. And, it putts to more acceptable standards.