Someone over on the other forum bought a CH3 from Amazon last month (also on offer) it arrived with an unusually high loft so they returned it as defective... I bought a total of 5 different Simpsons from them recently and had to send a couple back, one had a huge 15mm glue bump and the other had an uneven/deformed knot.
Either QC at Simpsons has gone down the pan or Amazon have acquired a load of seconds. All that said, it's Amazon so if you're not happy just send it back for a full refund... Zero risk.