HOWTO: My lists won't sync from the desktop to my iPhone!
Portal lists are automatically set up to synchronize, but custom lists are not. If sync seems to be working but your lists are synchronizing to your phone, the most common reason is that synchronization hasn't been enabled for that specific desktop ListPro file.
To enable synchronization for a list on your Windows PC:
The file should now appear on your iPhone. Note that enabling synchronization for a file will allow you to synchronize every list in that file. You do not need to enable sync for every list in a file.