Facebook – Where has the “followers” button gone

As I said in the comments

I have read in some places that the username is held for a bit (a few weeks) before it's released. Now it's not to say it's not possible; Zuck had his personal profile merged with his page and got a permanent redirect on one, but it's whether Facebook is inclined to help every soul out there.

So it is possible some lag time is held to account for name squatters and vandalism. Seeing that you were able to make the switch makes this even more valid. I would imagine it is not something Facebook is trying to make widely known as this would just increase the number of complaints from users that their username switch isn't working.

There isn't really anyway to know for sure why friend A sees the section and friend B does not. You may need to compare actual activity per post. For example my music section will always appear regardless of what future privacy setting I have placed because all previous stories were set to public.

The same goes for the likes section

You can try setting the privacy to public and see if that changes anything. If it doesn't most likely

• it can be that Friend B doesn't have Timeline sections yet (i.e. they will not be able to see it in this format, so the Audience Timeline preview is giving incorrect results) or

• it's a bug and you should submit a report https://www.facebook.com/help/contact/297365590303574

(A sure way to know, would be to ask the friends themselves if they see it, don't trust the "view as" tool at face value)