Hello Sharma
Every form have a version located at the lower left corner of form, if you look at your old form which you submitted, it has a date of IMM 1344 A (04-2009) E and that form should not have validate button.
Now new IMM1344 A form have a version located at the lower left corner, labelled as IMM 1344 (08-2014) E.
Since you dispatched all the form in August 2014, and new form came in the same month, they got a chance to send you another form to fill up. But you should hear from them between 2 weeks to a month, hopefully.
Regards
Z