This listing is one I know 100% where this glitch has happened
http://uk.ebid.net/for-sale/40119054...-137929812.htm

I will give as much information as possible

A week or so ago, on the listing number 137234608 I edited it via the adroid app, the edit was changing the quantity from 2 down to 1, and was updated to a quantity of 1.
Looking at the auction ID 137234608, it seems to have closed showing a listing of 2, when in fact it was only 1
Now on the item link above 137929812 (which I have just closed) it was relisted as a quantity of 2 by the mass repost system, and it was relisted from my PC. It should have only relisted as one as the quantity had been changed prior to the listing closing previously

I hope that makes sense