@Big Mach: Thank you very much for your reply.
What exactly is Autoland?
I'm a flight simmer and my aircraft of choice is the A320. During and ILS approach, when only one A/P is engaged, the PFD shows "Cat III Single" when both A/Ps are engaged it shows "Cat III Dual".
During Autoland does the a/c select flaps, speed, etc. by itself? Even when single A/P is engaged the a/c still lands itself by intercepting the LLZ and G/S (by engaging LOC and APR buttons). So what's the difference when both are engaged? The only difference, I reckon is, as you said, to be safe in case one A/P suddenly fails. So, I'm still confused about Autoland...