Thanks for the help musicvid, but is there any way to separate them by default i.e as they are pulled into the timeline?

Yes, I would like to chime in on this topic because I have noticed the same annoying behavior. I once successfully edited a three camera shoot, selecting the camera by the "Composite Level Envelope" method. So I had three video tracks stacked one above the other. The only way I could get the audio track from the second and third camera from being deposited over the primary audio track was to add the next clip at the end of the first, pull the audio track down where it belonged and then drag the clip to the left where it belonged.

Seems to me that the audio track should go down as many tracks as the video goes up!

Although I understand the logic of the Premiere approach, I've never had a need to do it that way. All of my audio comes from separate sources, and one camera's audio is used as a sync reference, which eventually gets muted or copied to its own track.

Try this: when you drag a video clip to the timeline, don't let go of the mouse right away. As you move vertically up and down, Vegas tries to position the audio and video close to where the mouse is when you release it.

If you want to keep your clips separate on the timeline, click on the track header of an audio track and drag it up above one of the video tracks, so you have a video track, with an audio track below it, then another video track, with an audio track below it. As you drop a video clip on the "upper" pair of video/audio tracks, it's audio will try to go right below it. As you drop a video on the lower video track, it's audio will go to the track below it.

It sounds like you want to overlap video clips but keep their audio clips on separate tracks. In this case, use the lowest video track, with a couple of audio tracks below it. Drag the clip to the video track, but keep holding the mouse and let it go while over the desired audio track. The video events will go on that lowest video track, and their associated audio events will go to whichever track you select as you release the mouse.

If for some reason you can't have your videos on the lowest track (like maybe you have a motion background or something), just temporarily drag the desired video track down to that position, place your clips, then drag that track back to the desired position in the stack.