Thank you very much for your email na ja, Now I check room disparity rate between Agoda and Booking.com which have answer follows
Agoda discount promotion have room rate total @ 3,760.40 Baht / night but Booking.com have room rate total @ 3,760.00 Baht / night
so all period agoda will expensive @ 5.60 Baht.
I you don't worry na I will reset room rate at Booking.com as same as your rate ka ( but please wait na ja, I will make as soon as possible na )