Some devices won't show the Track # field written by MediaMonkey for WAV tracks.
This occurs because some devices expect an uppercase tag (like Windows Media
Player), whereas others expect a lowercase tag (the default used by MediaMonkey).
If this is an issue for you:
1. Close MediaMonkey
2. Load MediaMonkey.ini in Text editor like Notepad
(for location see: http://www.mediamonkey.com/support/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=17)
3. Locate '[WAVTagging]' section (If you can't find it Append new line with '[WAVTagging]')
4. Add line 'UpperCaseITRK=1'
5. Save MediaMonkey.ini
Any subsequently written tags will be compatible with your device.