While "Final Attack Orders" is active, if you attack a face-down Defense Position monster, the monster is changed to Attack Position, then damage calculation is applied with the monster in Attack Position.
While "Final Attack Orders" is active, you can change monsters like "Guardian Sphinx" to face-down Defense Position, and while they are face-down, "Final Attack Orders" has no effect on them.
While "Final Attack Orders" is active, you can change the Battle Positions of monsters with "Curse of Fiend" or "Little-Winguard", but the Battle Positions are immediately changed back to Attack Position by "Final Attack Orders".
While "Final Attack Orders" is active, effects of "Goblin Attack Force", "Giant Orc", and "Dark Zebra" are resolved, but they are immediately changed back to Attack Position.
While "Final Attack Orders" and "Light of Intervention" are active, you can Special Summon a monster in face-up Defense Position, but it is immediately changed to Attack Position.
The effect of "Final Attack Orders" cannot be chained to.