Derange + Disease counter from Vampiric disease

Dos a vampire with Derange + Disease counter from Vampiric disease burns 1 or 2 blood?

I feel that the text from Vampiric disease is a bit non-standard.
It doesn't say "pay 1 blood to unlock" but "when you unlock, pay 1 blood" (also that would influence in several unlocking cards)

Thanks

Name: Derange
[Sabbat:R, CE:R, Third:R]
Cardtype: Action
Clan: Malkavian/Malkavian antitribu
This is a +1 stealth action.
Put this card on a younger vampire. The vampire with this card is considered to be the same clan as the acting vampire. The vampire with this card does not unlock as normal. During his or her controller's unlock phase, he or she may burn 1 blood to unlock. The vampire with this card may move it to another vampire as a action. This card cannot be placed on a Malkavian or Malkavian antitribu.
Artist: Eric LaCombe

Name: Vampiric Disease
[Jyhad:R, VTES:R, Tenth:A]
Cardtype: Master
Master.
Put a disease counter on any vampire. Each time a vampire with a disease counter is in combat at close range with another vampire, the second vampire gets a counter as well. An afflicted vampire cannot gain blood by hunting. When an afflicted vampire unlocks, he or she burns a blood or, if unable, burns the disease counter. A vampire can have only one disease counter.
Artist: Mark Tedin

Thanks