Unfortunately, usdb still does not support duets properly. All duets are marked as [DUET] in the title and the edition as a reminder. You can however add them as metatags for the syncer: p1=p1_name,p2=p2_name.
This should be a Duet-Version, but the tags for P1 and P2 are missing in the txt-file and I can't edit it for some reason.
At least the ordner of the text segment is correct, there is Rebecca's text first and after that the text of the men's choir. So it's quite easy to fix.
I'm sorry, that's not the way I wanted and uploaded it