As you have already surmised, the tracks with the double speaker icons are stereo tracks and the one with the single icon is a mono track. You evidently have a mono audio hence it goes to the mono track; and, as you've discovered, you cannot move a mono audio to a stereo track, nor vice versa.
As to deleting audio tracks, right click on any of the audio box on left, and choose Delete Tracks, and in the pop up box, select Delete All Empty Tracks.
To get your Track order, as you like it, after you have followed the above advice, you can Create New Track, and choose the type, plus where you wish to locate it, relative to your targeted Track. As I always rename my Tracks to reflect their use, only the Track location (in the stack) and the type have meaning to me. Personally, I keep my mono Tracks below (in the stack order) my stereo Tracks, but that is just me.
SOUNDBOOTH and or PREMIERE PRO CS3
I have a questions posed to me about SOUNDBOOTH editing. How can one either in SOUNDBOOTH or in PREMIERE PRO CS3 - edit the playback - so show beat by beat - is that possible? I'm not musically inclined. If I want to cut/edit a sound and match it with a similar of another - how can I go about that?
please email me as i'll forget to check here for replies - firstname.lastname@example.org