Brendon, Jim, thanks for trying to help me with this. The process I follow is as Jim describes. I start with "Burn Data Disk", then select folders I want to save. App creates a list of files within those folders and (with click of green arrow) saves to DVD. I then save my folder selections as a project. This is a new server running Windows 7. It did not come with Roxio software pre-installed, so I bought and installed. Previous server ran Windows XP and came with some version of Roxio software already installed. The old server is still around, and I could fire it up to find out what version of Roxio it is running. What the previous version of Roxio did is store the selected folder list and not, apparently, the file list. Each time I opened Roxio and the project to perform a backup to DVD, it would create a new list of files in the selected folders. It didn't seem to care what files were backed up previously or what files had been added to folders. It made a list of files currently present and backed them up.
The only time the old version of Roxio would mimic what I'm seeing now is if after doing a backup one day I left the application and the project open, then tried to click the green arrow to do a backup the next day, it would give me error messages saying certain files were no longer present. If I closed the application/project and restarted, it would recreate its file list and back things up just fine.
I'm trying to make the backup/copy process as simple and automated as possible for the non-technical employees who perform the daily backups. I want them to be able to open a saved project and have it backup/copy to DVD all the files currently in the selected folders, and not give warning or error messages about files that have been deleted since yesterday.