Luxembourg won 1-0 in Ireland, lol. They and the Faroes have improved a lot in recent years and can often hold their own with mediocre sides now rather than losing 4-0 all the time.
San Marino are part timers but I seriously doubt they are the worst team in the world, as their official ranking suggests. There are a number of tiny Caribbean and Asian islands I'm pretty sure they would beat in any best of seven series, etc.