I recently voted to closed several questions as duplicates: 1, 2, 3 and 4.
Somehow they have different fate: and first and the fourth one got into the review queue, and the fourth closed (by a gold-badger).
The second and third one, if I understand correctly, are not yet in the review queue. Actually I doubt if they will: my closed vote have already been invalidated (see their timeline 2, 3)
That seems to be a bug (at least a wrong feature). It is fine that closed vote are invalidated after the review are completed (like those in the first question, somehow it is not shown in the timeline that the votes are gone). But if it is invalidated before triggering a review, then there is no way an individual user can trigger a closing (without putting it in CRUDE for example).