Yes with QTpro propertis Cmd-J you can flag the chanel as LeftTotal and RightTotal but it is still two mono chanels.
You can see the diffrence if you open a mov file with a stereo pair.
a stereo pair is seen as one track/chanel in QTpro and if you mark that you can see under sound settings two tracks.
If you look at a mono file it only has one track witch you can assign a lot of diffrent “flags” as Left Right Center and so on.
So I would like to merge two mono tracks in to one stereo.
Thanks