Second is the ban feature, you should be able to see a list of all banned ip's and then a clean way to un-ban them. With these 2 items fixed, it's an excellent product.
Well, the site was offline because of the 3rd party extension I installed a day ago. I noticed that today at approx. 11 AM. After uninstall, everything was back to normal. My apologies, it was really unpredictable.
Regarding your second point: you can see the list of all banned IP's in Anti-spam tab. How do you imagine the better way to unban them? Thank you for any ideas.