Hi Glenn
Thanks for the suggestions.
Regarding this one, you can change the track numbers but you have to do it in the Save dialog rather than in track properties. Although this seems rather odd, it is because the the numbers in the track Properties window are simply an enumeration of the tracks in the current file. As you split or merge tracks, these numbers update to provide a cross reference with the tracks listed under the 'Tracks' menu.
However, when you 'Save', the program lets you choose a starting track number and whether to use consecutive numbering if, for example, you don't save all the tracks. The track numbering you select in the Save window is written to tags if the format supports them.