I have split the backup of a filesystem of drive E: in two backup jobs, the first including several directories like \users, \install, \logs etc, the other selection only includes one directory: \groups.
When we try to restore something from the first selection we can browse all copied directories and we are able to drill down to a particular directory or file we want to restore. With the second one we only see that drive E:\ is available for restore, we do not see the subdirectory and we are not able to select any of the subdirectories.