Finally got through to Shred Stixx, definitely seems they confused a lot of people. The Piranha only has 3fins, you can order a custom Piranha with 5fins. They changed the board names for 2013 and not offer a stock 5fin set up but they changed the shape of the board a bit. Not only do I think customers were confused, but the dealer I bought from seemed to be confused as well.

All in all, they were great about answering questions concerning what type of board I was looking for based on my wave and riding style. Always good to chat with an actual company than a dealer. I think I am going to keep the 3fin piranha.