Stab and Grab (Ex): At 3rd level, as a full-round action, a cutpurse can make an attack and also make a Sleight of Hand check to steal something from the target of the attack. If the attack deals sneak attack damage, the rogue can use Sleight of Hand to take an item from the creature during combat; otherwise this ability can only be used in a surprise round before the target has acted. If the attack is successful, the target takes a –5 penalty on the Perception check to notice the theft. This ability replaces trap sense.
3级时，以一个全回合动作，扒手可以进行一次攻击并同时对攻击目标进行一次巧手检定。若该次攻击造成偷袭伤害，则该次巧手检定可以在战斗中用来偷取目标的一件物品。该能力只能在突袭轮目标未行动前发动。同时，若该次攻击名字，目标对该次偷取的察觉检定有-5罚值。取代陷阱感知。
然后回答你的问题。 巧手技能一般情况是无法在战斗中使用的（见巧手技能说明），战斗中的偷取需要使用steal（偷窃）战技。
而这个能力允许在突袭轮目标行动前使用巧手来偷窃。
但是突袭轮怎么拿全回合动作呢？
我看了下官网讨论版，没有一个明确的回答。
所以这里依然只是一个BUG的可能性最大。
enjoy it
