Well, what a revelation. I had no idea of what the "Interleave" setting was for, and so left it alone. Now I have done some experimental tracking with and without "Interleave", but the track still sits in the middle.
I went back and listened to some previous recordings I had done, and have discovered that they too seem to be predominantly centre, yet the mixes sound full and seperated.
I have read a lot that if your mixes sound good in mono then you are on track to a good mix. As you've already guessed I am still pretty much a novice.
So now I am confused. How do I record a track so that I can later position it left or right in the mix? And, I'm still not sure of what the "Interleave" button is about. As stated earlier, it doesn't seem to have much effect. I have searched the manual, but that presupposes that you aready know its function.