@softworkz any idea how the channel count can get messed up like this and what is channels_original?
"channels_original" is a field from the output of the MediaInfo application. It's nothing official or standardized but rather an "invention" of the MediaInfo developer and its naming is not really intuitive.
The developer also states that "Cannels_Original" would be taken from the raw audio stream while Channels would be taken from the "container header". While I think that "stream metadata" would be a more valid naming, I can confirm what @pünktchen already said: The source file is encoded incorrectly.