Hi pollitt,
I'm not aware of any current problems with our automatic feedback system. Our automatic feedback system is actually designed to automatically leave positive feedback for your buyers within 24 hours of when they leave positive feedback for you, so the system may just not have had enough time yet in the example that you provided.
If you find that our auto feedback system is not working for you as I described above, I recommend contacting our customer support team using the form on the following page:
http://www.auctiva.com/help/requesthelp.aspx-Mike