I import a stereo file that has my vocals in one channel and a podcast guest's vocals in the other (file.aiff).
Now, usually what I do is drag the file into my project audio. Then I go to file > copy convert > interleaved to split, and change the name:

This used to give me two files in my project -- I'd then disconnect them and have all the audio from one channel in one file, all the audio from the other in another -- then I add one to one track, the other to a separate track ... and I have my vocals on one, the podcast guest vocals on the other, and it's therefore easier to make any adjustments I need to the audio. (If there's a better way to do what I'm doing that I don't know about -- would love to hear that as well.)
Anyway: now when I click save, it first says "converting to interleaved":

And then I only get one file added to my project (instead of the two L / R ones I did before) ... and I can't split it at all.
What the? Any suggestions?

