AR is starting to remind me of a complicated video game, where the more you are into it, the more you discover the secret passageways that are not initially apparent!
Just follow the instructions. Make sure that you save the code (that is emailed to you) in a draft post as HTML before switching back to wysiwyg to finish posting in your AR claim post.
Important step after you are sure your post is online, click on the Technorati site button that says "Release the spyders" (located under the code link).
Then when it says "claimed", enter the info about your blog.