Did you take a gravity reading before moving to the secondary? I I also noticed you said you lowered the temp to 47, was that the entire length of the secondary? 47 is below the recommended low end fermentation of that strain. I have never used this strain so I don't know if this is an issue or not. It almost sounds to me like it did not stop fermenting. If you have an empty keg I would take a gravity reading and then pitch a pack of us05 into the keg, resealer the keg with co2 and bleed off the pressure 2 or 3 times a day. Lave it a couple weeks and then take another gravity reading. I will make sure my fermentation has finished and then cold crash for a day or two but have never had beer that has the consistency that you are describing.