Fy 2012-2013 filing is possible now? got a compliance notice

My mother has got a Compliance notification in her email address for not filing her FY 2012-2013 & FY 2013-2014 IT returns. She was asked to submit an online response before Dec 15, 2015. She is a government employee and had missed out filing her returns for these years. There is no additional income and she has got her Form 16 details for both FYs.

Through e-filing I have filed her returns ITR1 for FY 2013-2014 under section 139(4) and e-verified the same through AADHAAR.

When I e-filed for FY 2012-2013 (the Option for selecting year is available in the portal), at the last submit stage it said that the "end date for filing is over". My questions are

i) Will the government provide an opportunity for e-filing FY 2012-2013 returns in the future? I heard from a few friends that 2011-2012 was extended.

ii) If not, why is the option for FY 2012-2013 open in the portal?

iii) How do I respond to the NMS Compliance status? And if I get a notice what should I do?

Thanks in advance.