IIRC Andy wasn't just a brother, he was Semie's business partner in a lot of the Mosrite incarnations. He should be ashamed of himself. His misrepresentations aren't accidental or innocent - he knows better. No partner in a guitar manufacturer would honestly describe a 24.25" scale bass as a short scale bass. Hell, that's short scale for a guitar! Mosrite regularly sold short scale basses, and they were 30" scale. This thing is a franken-freak.
What bothers me just as much is that he represented it as a 40 year old instrument. That implies it was an instrument that had been manufactured by Mosrite 40 years ago, shipped to a dealer and sold at retail, and now the current owner was selling it. But this appears to be something he assembled from his old parts box, not an actual instrument manufactured and shipped in 1968. That's flagrantly false advertising. If you had known he was the seller, you might have been suspicious, but even so, he owed you a legitimate description and you didn't get it.
Sue him.