I am also seeing the same issue with the excluded folders. Is this plugin still being maintained? There isn't much going on in their GitHub repository.
Everything across each share, including the Recycle Bin, is being backed up by my backup software. While I could exclude the folder, doing so for every new share would get tiresome. If I could relocate these files to an other share, let's say a Recycling Bin share, it would make maintenance simpler.