I really don't understand why I can't gain any reputation in crucible or vanguard after turning in bounties....
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Your Warlock has a Future War Cult band equipped. It's called "The Chaos Constant," and it moves all your reputation to Future War Cult. Unequip that band and then you will get Vanguard and Crucible rep points as normal.
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Well your Warlock is wearing a faction's item so any reputation you would earn is being sent to that faction instead on Vanguard or Crucible.