Hi PG,
I’ve tried about everything (renaming files which had -,_, etc.) and added either -L -R, or L R, etc.
What baffles me is that when I set a specific rule in the Audio file Editing preference, it looks like it’s not remembered, or saved. And yes: I do try opening both files at the same time. Even tried the old way (holding ctrl key while dragging).
Right now, the only way around was to open the files on mono tracks, pan them and render to get a stereo file. Not very efficient…