Thanks for the report.
I suspect it is trying to send a notification for each folder of the Our Files hierarchy. It used to be the case that users would subscribe for notifications independently for each folder, but since its recently been simplified to just subscribe to notifications for the whole site then I think the notification logic is wrong for Our Files.
Do you get only one notification if a file is added to the root directory of Our Files?
Or, do you get three notifications if you create a file inside a folder inside a folder?
I'll check this out on our test site and hopefully get a fix on the live site soon.
Voice Admin