Some questions about video in Sonar. Video with multiple audio tracks and other stuff...

So I'm figuring out a few more things in my video adventures.
 
One thing today was about how an AVI file (and maybe other vid format files) can have multiple audio tracks associated with it and that certain programs (like DXtory) can extract those audio files out in various ways. Before I blather on about that...
 
I was reading a bit about the video import stuff in Sonar. We can import the vid and choose an option to have the audio automatically stripped from the vid and tossed into an audio track (of course and simple enough... I knew that).
 
What I'm wondering is in a video file that has MULTIPLE audio files attached to it (like screencast videos where the recording program allows you to record a mic input on their own audio track separately from the main audio such as system sounds) will Sonar load those two files into their OWN tracks (so two tracks) or will Sonar mix them together into one track?
 
Okay... so back that DXtory program. With that installed it seems you can just navigate to the folder where the video file is located, right click and select "extract audio stream" (or something like that). That makes it so the audio file gets yanked out from the vid into wave format and appears in the same folder as the vid. If there are MULTIPLE files attached to the vid (like I was referring to before) you end up with two audio files (plus the vid file).
 
That's why I'm asking. If Sonar will yank ALL audio tracks from a video file and toss them into their own tracks in the Track View then obviously I don't need yet another program to make that happen. If it mixes down all tracks into one track (and there is no option to change that) then yeah... I may need some kind of "splitter" program that can. There seems to be a few out there.
 
This video shows what I'm talking about (the actual in folder extraction occurs at 1:30)...
 
https://www.youtube.com/watch?v=pkfcGAnpGWk
 
So yeah... when using the "Audio in new track" video import feature in Sonar would I get ALL those audio files in their own tracks or just one or a mixdown of them all or what?
 
Strange (or dumb) question perhaps but I'm seriously new to all this video crud.
 
Cheers.