From FAQ
An opponent who fails to detect your Bluff when you use
Quicker Than the Eye does not see the partial action you take
after the Bluff, so your opponent is denied his Dexterity bonus
against your melee attacks. If you also have the Expert
Tactician feat, you can make an immediate free attack against a
foe who failed his Spot check against your Bluff. Once you do
so, that opponent is observing you again, and that opponent
will observe you if you try to run away after the free attack.
Because the attack you make by virtue of your Expert Tactician
feat is a free action, you could attempt to use Quicker Than the
Eye again, but your opponent should get a bonus to the Spot
check. The second Bluff check also is a move-equivalent
action, so you would be done acting for the round. If the second
Bluff check succeeded, however, your opponent would once
again not see you, and you could make another free attack by
virtue of your Expert Tactician feat.
Sage made here a mistake allowing more then one free attack per round. This would allow you to make infinite numbers of attacks if you attack someone flatfooted.
Ex.:
1 You win initiative you move next to enemy.
2 Your enemy is denied dex.
3 You make free attack.
4 Is your enemy denied dex?
5 Yes -> Go to point 3 till your enemy is dead.
Expert tactician feat should NEVER allow more then one free attack per round.