Form 16a tds certificates

first question

Q4 FY 2011-12 we have filed the return and then we came to know  for one deductee pan no was incorrect then we filed the revised correction return. Now again we came to know that  for one deductee tds deducted and paid to govt was not recorded in that return for that Q4 return . can we file again revised return

second question

In the above quarter there are suppose 10 deuctees and for one deductee the pan no is not correct then for other remaining deductees can I issue tds certificates which has been already downloaded from nsdl websites. My doubt here is that tds certificates which is given by nsdl websites will it be changed after filing correction revised return ( correction for pan no of one deductee).

third question

for the above quarter all the challans were paid to govt in time but last challan was late and paid to govt on 4.6.2012. Now on all certificates of that quarter we have to put the date after 04.06.2012  for eg 05.06.2012 becuase while dowloading the form 16a from nsdl websites for that qurter we have to put one date for all the certificates. Why I am asking this becuase date of certificates also attracts the penalties correct ?