Sorry about the lack of response, I rarely check Steam (Discord is where I'm usually active).

With regards to your issue: there's a chance that it's a glitch in how it's checking the archive.
If you try opening the archive (gsba file) in your favourite archiving tool, you might be able to confirm this. A 'reg' file should be present, populated with the data backed up from the registry.
Are you able to confirm this?