troydaniels: I understood what you had said.

Displaying your points are calculated including green ( A5, B5 and B4 ) squares.
Your points：
A9, A7, A5, A3, A3, A1, B5, B4, B2, B1, C6, C1, D3, D2, E2, E1 => 16 points
the opponent's captured pieces: 7
komi: minus 3.5
hence your score: 16 - 7 - 3.5 = 5.5

Will you understand my explanation?

Your question's answer is written in Go rules : Since the black player starts the game, he has a significant advantage. In order to balance it, a value called komi is subtracted from the black player score. It is 5.5 for a 19x19 board, 4.5 for a 13x13 board and 3.5 for a 9x9 board.