Hi Kristy. I ran a Piranha setup for about a year. I did have to have the torch replaced twice (the burners needed a few kinks worked out, now they run great). The center fire will always be longer than the outside candles though. You should be able to play around with your dials and make the candles do different things. Reducing means yellow candles and oxidizing means bluer candle with a hiss. If you can't make that inner fire go completely blue, I would say something is definitely wrong with something. I am on NG with two oxycon's. I now have the Barracuda that has the Piranha inner fire. It works like a charm. If you call Bethlehem, ask to speak to Jerry, I think it is. My mind is mush right now but I think that's his name
Good luck