12 May 2013
Second return is invalid because your first return was filed late. And therefore can't be revised. Therefore the second return has nil value. And for the purpose of refund you can contact the AO to whom the return was filed. Ask him wether the return had been processed or not. If not been processed than wait till the time it gets processed. If the same had been processed than file a rectification application under section 154.
27 June 2013
No second return can be treated as revised return if it is filed in time. Till to-day processing has not been done. So you write a letter to the concerned officer if the returned income in both the returns are same for considering the original return as filed by you under the provisions of section 139(1)