How is the HT bypass intended to work on the LS100? On mine, activating HT/BP from the front panel allows the HT signal to pass through but whichever input that was selected prior to selecting HT/BP also gets mixed in with the HT signal. If the CD input was previously selected, I'll hear the HT signal plus the CD signal mixed together (assuming that the CD is still playing, of course!). Is this the intended behavior? Thanks!