Weird audio behaviour from merged clips... 5 channels into 25?!

hello helpful community,
So, I have hand-synced quite a few clips for a project, and made sub clips by dragging everything into a bin.
The original audio files were .wav with 5 mono tracks, according to the modify clip window…
Now, after merging them, when I drag them into a new sequence to edit, the audio contains 25 channels, and the vast majority of them are blank… there is only audio on track 1,7,13,19 and 25.
Anyone fathom why 5 tracks became 25? I thought maybe each original track was a 5.1 track or something, so it split it into 25 mono tracks, but it says in the modify window that they are mono.
Any help would be great.

thanks for then pointer.
Seems others have had this problem.
Does manually deleting the additional audio tracks cause problems to propagate forwards? Any idea when this issue might be rectified?

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Tom Wolsky wrote:
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Bill, I read your article, but I'm not entirely sure I understood it. I will read it again.
My question is (see graphic below):
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Weird audio behaviour from merged clips... 5 channels into 25?!

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