I have a folder that was not being backed up and after investigating I found that the backup program was using the wrong name. However, the name they were using had been the name before I renamed it. I thought I just needed to refresh what the program was attempting to use but it continued to use the previous name.
So in fact the directory wa being backed up but with the wrong directory name.
What I found when I selected the directory bar in File Explorer was that the name displayed would change from "new name" to "old name". In 30 years of using Windows this may be the starngest thing I've seen.
I checked the name using "dir /X" to see the alternate short names but this did not give me any info.
Any ideas how I can fix this?