SpoilerOops, screwed up my attack/damage rolls above:
Attack #1: (d20+14)[23] - Damage: (d10+9)[13]
Attack #2: (d20+9)[20] - Damage: (d10+9)[19]
And with those rolls, it doesn't much matter how the damage sorted out in the previous round. Booyah. Throshy like Power Attack!
I just confirmed that Power Attack takes points off all attacks in a round and adds to all damages; can't restrict it to just one. I've removed 2 from the attack rolls and added 4 to damage rolls.