It seems that Composer View (like Artist, Album or Genre -- the ONLY four options you view by on an iPod) doesn't use Track Number when sorting.
To be clear:
I have an album. It is correctly tagged. When I access it via Artist, Album, or Genre menus it is in track order. When I access it via Composer, it is in alphabetical order.
I had a friend try with iTunes, and it works fine. This appears to be a Winamp/plugin problem. I have 3.10, which I do believe to be the latest.
Any help would be greatly appreciated!