[Suicide Junkie]

They don't show up at the bottom unless you name the dummy item "zzzz!" or similar, but they certainly don't show up at the top.

That being said, if you add things to the queue from the queues list, the sort order does not immediately change (that would be a pain when the thing you are looking at jumps around).
You can close/reopen the window or just click the list header again to trigger a resort.