User blog comment:Sannse/How to Get Unblocked/@comment-24813226-20140728194209/@comment-452-20140728205932

Yes, "Automatically block the last IP address used by this user" is checked by default. If it is unchecked, "autoblock disabled" is shown in the block log, which it is not: http://jacktheguy5.wikia.com/wiki/Special:Log/block

Before you unblocked autoblock #3, it said "Autoblocked because your IP address has been recently used by "Road Runner1".", so there is no uncertainty that his IP was autoblocked.