So if two separate people did the exact same thing it wouldn't be cheating, but because it was the same person hitting the button, it is cheating?
yes. using alternate accounts to gain advantage is cheating. even in FFA.
You shall not operate more than one WarLight account in a way that gives you an advantage in a game, tournament or ladder.
it's pretty explicit.
or would you think it would be a fair game if you would join a ranked 6 person FFA where 1 person would be me, 4 of them my alt accounts, and the other one you?
if the two accounts are friends, sure, it's legal, extremely unfair against everyone else and i would blacklist them anyways, but legal. if they are the same person it's cheating.