Unchained Monk and Double Weapons

[Thatcher Iliff]

My friend is trying to build an Unchained Monk using a Double-Chained Kama. When using the double chained kama as a double weapon, how does it stack with Flurry of Blows? I know the old Flurry emulated two-weapon fighting, but the new Flurry only "adds one attack at your highest base attack bonus". In other other words, does the character get 3 attacks (when using it as a double weapon with two weapon fighting) all at -2 to hit?

Kama, Double Chained wrote:

The wielder can attack as if armed with a single kama in each hand or extend the chain to make a single reach attack. By swinging the rope, the wielder can whip the kama about to disarm or trip opponents. Furthermore, if one of the weapons is dropped, the wielder can retrieve as a free action by pulling on the chain.

Flurry of Blows wrote:

At 1st level, a monk can make a flurry of blows as a full-attack action. When making a flurry of blows, the monk can make one additional attack at his highest base attack bonus. This additional attack stacks with the bonus attacks from haste and other similar effects. When using this ability, the monk can make these attacks with any combination of his unarmed strikes and weapons that have the monk special weapon quality. He takes no penalty for using multiple weapons when making a flurry of blows, but he does not gain any additional attacks beyond what's already granted by the flurry for doing so. (He can still gain additional attacks from a high base attack bonus, from this ability, and from haste and similar effects).

At 11th level, a monk can make an additional attack at his highest base attack bonus whenever he makes a flurry of blows. This stacks with the first attack from this ability and additional attacks from haste and similar effects.

[Lost In Limbo]

Flurry of Blows wrote:

At 1st level, a monk can make a flurry of blows as a full-attack action. When making a flurry of blows, the monk can make one additional attack at his highest base attack bonus. This additional attack stacks with the bonus attacks from haste and other similar effects. When using this ability, the monk can make these attacks with any combination of his unarmed strikes and weapons that have the monk special weapon quality. He takes no penalty for using multiple weapons when making a flurry of blows, but he does not gain any additional attacks beyond what's already granted by the flurry for doing so. (He can still gain additional attacks from a high base attack bonus, from this ability, and from haste and similar effects).

At 11th level, a monk can make an additional attack at his highest base attack bonus whenever he makes a flurry of blows. This stacks with the first attack from this ability and additional attacks from haste and similar effects.

The first bolded line made me think this might work, but the second one seems to negate that. He takes no penalties for using multiple weapons but also doesn't get any extra attacks which seems to cut out TWF.

[Kazaan]

Wielding multiple weapons and getting extra attacks using TWF rules are two different functions in the game. If you had BAB +11 (3 iterative attacks), then you could attack with your righthand weapon at +11, your left-hand weapon at +6, and then kick with your foot at +1, for instance. This does not count as TWF as you are still only getting your 3 BAB-based attacks, so you suffer no TWF penalty and none of these are off-hand attacks so none of these suffers half Str to damage.

In the case of Unchained Flurry, you, essentially, have either end of the DCK at your disposal and can make any of your Flurry-allowed attacks with either end of the weapon. But you don't get extra attacks on top of that for the fact that you are wielding a double weapon. So lets say, for the sake of example, one end of the Kama is +1 Mithral Flaming and the other end is +2 Adamantine Shocking. You have 3 iterative attacks, plus 2 additional attacks from Flurry. That's 5 attacks total, 3 at +11, 1 at +6, and 1 at +1. You can assign those available attacks to either end of the Kama or Unarmed Strikes at your complete discretion.