Stereo vs. Ch 1 + Ch 2

Hi,
I’ve been having major issues with the differences between “Stereo” and “Ch 1 + Ch 2” in FCP HD. I basically filmed with a shotgun on Ch 1 and the on-camera mic with Ch 2, so the audio levels and clarity on Ch 1 are much better and that is what I will use in the cut. All my footage was captured with “Ch 1 and Ch 2” under clip settings. When I look under the audio column in the browser, my clips are listed as “A1 + A2”. My question is:
1. When I watch a video clip with “A1 + A2” audio in the viewer, why do the levels in the audio meter (right of timeline) rise together as if it was recorded in stereo? But the waveform of the 2 channels in the timeline appear different.
2. Vice-versa, “stereo” files play in that audio meter at different levels for Ch 1 and Ch 2, which seems to me to be the reverse of what should happen.
3. When I use that “A1 + A2” clip in other projects, sometimes it changes to “stereo”. Why is that?
4. While capturing, does Final Cut Pro ever mix the Channels 1 & 2 into 2 channels of identical (mono) sound? I do NOT want that.
Am I the only one confused by this terminology? I’ve read the manual and Lisa Brenneis’ book about the differences. Should I just reverse my previously held view of what combined stereo and separate Ch 1 & 2 mean? This whole problem originated when I gave footage to my transcibers and they complained that the audio was not clear in many parts (yes, I know I used a shotgun). So while watching the footage I discovered that some parts had Ch 1 and 2 rising together, which led me to conclude that the audio was mixed together during capture. I’m hoping this did not happen as it will result in me having to recapture dozens of hours of footage.
Any help most appreciated,
Alexander

the audio level meters in the timeline are correctly displaying that the signals being sent to the L and R channels are identical, if you pan a1 to the right and a2 to the left then the timeline audio meters will be showing a1 on the left meter and a2 on the right and the difference in level will be apparent. If you only want the a1 sound but coming out of both speakers then delete a2 or drop the level on it.
the timeline meters are left and right output, they bear no relation to the numbers of the tracks in the timeline, only to the panning applied to those tracks. If you pan all your tracks left then only the left meter will have anything to display.
typically editors use split (stereo) tracks so that they can easily hear the difference between two mics recording the same sound (like you have in your clip) and then centre the panning for playback to clients once they've done their mixing.
And no, FCP doesn't ever mix down your audio on capture. If you want to change your audio clips from dual mono to stereo at any time you can do so by selecting the relevant tracks and hitting alt l. This switches the panning between centred and split and also means that you can apply keyframes to both tracks simultaneously

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