The revised agreement is back dated to April 2013.
However, HKD 1m payment has been made in April and May 2013.
Please note that the TB balance (as of May 13) that Chatkaew sent you is based on HKD 1m.
You will need to rectify the AP-AR between AVCHK and AVC Vacation Club. (The gap is about HKD 18m)