Have you contacted CA about this? I'm curious of what they have to say. I may send an inquiry.
I did, but you know their CS is the worst on the planet. May be multiple users raising the same concern might jolt their self respect. All this time I've been taming my sub in Stereo+Sub mode not knowing that it was all wrong measurements. I only got to know when I applied 3 BFD filters to bring down 3 peaks in my FR with 80Hz crossover, and the 2 filters after 45Hz had no effect. I thought my BFD developed some fault. To further check I applied 48dB cut (maximum) at 53Hz and there was hardly any difference. The reason is that 53Hz frequency was not being served by the sub despite an 80Hz crossover, it was in the speakers.