Simple Auto-save question

I just started implementing the auto-save feature every ten minutes on the odd chance I forget to save while working. I noticed something I don't understand though. Normally, when a project is in a changed-but-not-saved state, there's a little helpful asterisk next to the file name in the window title. It's great because I know I'm all saved up when that asterisk isn't there. However, I see that when the file is auto-saved, that asterisk doesn't go away. I've noticed this a few times, where I'm not doing anything and I see auto-save kick in, but then the file still looks unsaved by the presence of that asterisk. What's the thinking behind that, am I misunderstanding something?

I think Steve is correct here. Also, you may want to be aware that autosave does not work if the transport is running (although if an autosave is overdue when the transport stops, it will happen immediately then).