These pics explain what happened-
I've got units on the yellow border of the Village
D, so I get points for it..
But I've got no units on the border of West Farm
C, they're inside the square in the houses, so I get no points there! Obviously I should have crept them out of the houses onto the border in the last couple of turns but completely forgot! Maybe I subconsciously had a quote of Bilbo Baggins at the back of my mind-
"It's a dangerous business going out your door"
Hypaspist forgot too on his side of the map, here's his endgame score sheet, note he only gets points for the East Forest
B..
because he's got units sitting on the border..
..but he gets no points for East Farm
A because he's got no units on the border, they're inside the square!
I don't think either of us are likely to make that basic mistake again..;)