Siegebreaker Breaker Rush and failed maneuver

[Bugromkiller]

I started a Siegebreaker today and from what I read from the Breaker rush, I don't actually need to succeed on the maneuver to deal the damage. Do I read correctly?

Breaker Rush (Ex): At 1st level, a siegebreaker can attempt bull rush or overrun combat maneuvers without provoking attacks of opportunity. When he performs either combat maneuver, he deals an amount of bludgeoning damage equal to his Strength bonus (minimum 1). If he has Improved Bull Rush or Improved Overrun, the damage dealt by the appropriate maneuver increases by 2 and he adds any enhancement bonus from his armor or shield (though such enhancement bonuses do not stack, if both armor and shield are magic). This ability replaces the feat gained at 1st level.

Also another question about Bull rush: If I succeed a Bull Rush maneuver by alot, do I need to push the target the maximum distance or I can choose how much I push between 5 feet and the distance granted by the roll?

[Korlos]

While you're asking, does your movement while bull rushing a target provoke AoOs from the target?

[Saethori]

1) You must successfully perform the maneuver to get the bonus damage. It's based on performing the maneuver, not merely attempting it.

2) You can choose how much you push your target, and how much you move with it, up to the limit allowed by your roll.

3) Your movement does not provoke attacks of opportunity from the target you are bull rushing. However, you may provoke from nearby enemies; the rules are uncertain on this and I can't find a faq.