Sometimes just the standard turn 'em off, turn 'em on trick to persuade Blogger to republish your archive index with all the archives included isn't enough. One thing that can help you convince Blogger to give you back your links is to add a post: if you don't have a post in the current archive period, Blogger can't be bothered to give you anything but your first archive link (yes, that is why I'm doing this as a new post, rather than adding it to the previous missing archives post).