When selecting your army, choose a Bloodline. All Vampires in an army must belong to the same Bloodline (von Carsten, Necrarch, Blood Dragon, Lahmia or Strigoi) and can choose the powers of their own family's list.. The following special rules apply to all Vampires of the same Bloodline, as explained below. These include bonuses and penalties that cancel each other out and so they don't influence the points value of the Vampires.
You will find more powers that can be bought for your Vampires. You cannot buy multiples of these powers for a single Vampire, but different Vampires in the same army can have the same powers. The points cost of these powers adds to the cost of the magic items chosen for the Vampire and is limited by the maximum amount of points the Vampire can spend on magic items (see the appropriate entry in the army list).