The sub level for stereo/upsample is a combination of the overall sub calibration level in the multichannel setup and the 2-ch sub offset. They add together. DVDs in DD/DTS/PLIIx/7.1 analog are only set by the main multichannel calibration levels.

If your 2-ch offset is -6 or -7 dB, you should probably try turning down the overall multichannel sub calibration off by something like -4 or -5 dB below where it is now and then increasing the 2-ch sub offset by the same 4 or 5 dB up to -2 or -3 dB. As long as you down with one and up with the other by the same amount, the DVD sub level will decrease and the CD sub level will be back where you like it.

That is why I asked for both you 2-ch sub offset and the overall sub calibration level in the multichannel setup menu.

Does this make sense, or am I totally misunderstanding your problem?