Was it normal ?

NIFTY OPTION 

One day before expiry,

that was, on 28th September 2016,

8700 Put OI up 15 lacs &

8800 Call OI down 6.5 lacs,

both closed @ 9 only &

NF closed @ 8758.

and

what happened next day also known now.

Was it normal or something else ?