Your school and you have done a little mistake. You will get increment after the last exam.date. You did not mention the last date of exam.
1) If the last date of exam fall on or before 1/1/16, then you will get an increment and another increment on 1/7/16.
2) If the date is after 1/1/16, then you will get increment any day after the exam. date.
3) If you got it then, you will not allowed to get increment on 01/07/16.
Now let us know the last date of examination.
The last exam date for BEd was 29-Dec-2015. Please let me know what should have been the correct proceeds? I have submitted all the relevant documents to the HM.