Flurry of Blows calculation

Question

Let's say, we have there 1st level Monk, and he has STR 17/+3. Now we are calculating base attack with his Flurry of Blows. For first level, we have "Flurry of Blows Attack Bonus" -1/-1, plus 1st level it is 0/0 and plus strength modifier it is +3/+3. When we are attacking with combination of Siangham, it doesn't matter, because it is still +3/+3, And damage is 1d6+3/1d6+3. Is it calculated correctly, or am i wrong somewhere?

Answer 1

Flurry of Blows Attack Bonus as Phill's answer, but damage includes the full Strength bonus.

A monk applies his full Strength bonus to his damage rolls for all successful attacks made with flurry of blows, whether the attacks are made with an off-hand or with a weapon wielded in both hands.

Answer 2

A first level monk has no +1 BAB to begin with, but even then the flurry of blows uses a different, separate progression, which is to be summed to any other BAB from different classes.

Quoting you:

For first level, we have "Flurry of Blows Attack Bonus" -1/-1, plus strength modifier it is +2/+2. When we are attacking with combination of Siangham, it doesn't matter, because it is still +2/+2, and damage is 1d6+3/1d6+3.

Answer 3

You do not add the monk BAB to Flurry of Blows, it has its own independent BAB, which the Str modifier is added to, ergo +2/+2. If the monk has levels in another class, you would add that BAB to the rolls.

Your damage is also incorrect for the off hand. The off hand adds only 1/2 str bonus to damage, so the damage would be 1d6+3/1d6+1.