Forum:Movement of a page does not show up on logs?

On an other wiki a Page seems to have been moved twice (to a new lemma and back) as it vanished from the New Pages Log but no evidence of the first movement seems to retain in the movement log or history of the page. Under what circumstances this can happen? To my knowledge an undo on a movement is not possible. T-Stripe (talk) 11:34, November 15, 2012 (UTC)