They did a similar thing to us after we got a draw there in February playing with 10 men for most of the game, a large group waiting just near the entrance to the train station behind a line of police. Very odd as you say.
You definitley deserved the win at the end of the day, the team was setup completely wrong in the first half and by then the game was over, I have no idea why the manager set us up with 5 in midfield and then ended up playing long balls to Simon Cox who is never going to be able to hold the ball...