Thanks for that, Johan, - you were right, - the route on the map had changed automatically and I just needed to turn south at the next village, which incidentally contained quite a force of bad guys.
It would have been much better to detour over the hills like you'd be able to in normal Arma 2 missions and like you probably would in real life if there was a high chance the village ahead was enemy occupied.
Still love Arma 2 despite this aberration...