I was doing some digging on this issue recently, and I can only concur with what you're seeing
ryan182. SQ to/from the US, only 2x 23 kg in all classes, 3 x 23kg as *G
Here's another couple of threads discussing the same issue:
http://www.flyertalk.com/forum/showt...hlight=baggage
http://www.flyertalk.com/forum/showt...hlight=baggage