I have this problem as well. Or a similar one.
When I create a new song, there seems to be no way to create it in mono. Then when I record and export, and click for it to be in mono (my track was in mono), it is 3 dB lower.
It's driving me nuts. Audition exports exactly what you've got in the DAW and doesn't mess with your loudness, why does S1?
Someone said it can be fixed by making changes to the output, but I'm stuck trying to. And there is no way I'm going to want to mess with that every single time I make a new .song, which is several times a day.
Can exports please be transparent with no volume being changed? Or else if someone who knows a workaround can help, that would be awesome.