Why didn’t Jeff mention Misty when admitting to the blackmail?

I’ve been thinking about the blackmail/postcards from season 1 and a thought came across my mind. Jeff admits to Shauna that he blackmailed Natalie and Taissa (sent the texts) for money, but he never makes any mention of Misty. If he was responsible for sending both the texts and the postcards, why leave Misty out? He says he thinks Tai or Nat may have had the money, but never brings up Misty at any point in time. Yet another reason that makes me think Jeff was NOT the sender of the postcards. Thoughts?