Got my non o 90 days extended and multiple reentry permit done today. Here are my timeline if anybody care.

0900 arrived Chiangmai immigration and wait to get documents checked.

0940 got a queue no. And was told to come back 1300.

1300 entered immigration office and was first queue no being called

1400 photo taken

1420 extension approved

1425 got new queue no. For reentry permit and documents copied and checked

1430 submit application and payment.

1435 reentry permit stamped on passport.

I am liberated for one year from the immigration red tape! (Well, may be 90 days report...)