According to Airfleets web site this AcJ 319 tail number 9H-LIV is registered with COMLUX AVIATION Malta since 06-10-2020.
If you look at the COMLUX.com web site you can view that this Airbus A319 is a luxury VIP Plane for charter.
I did not attach any photos od the plane interior as I do not kmow if it is permitted.
Before Thai Smile, Thai Airways operated a few A320 and they all had 8 business class seat. It is quite common to see that in some airlines.
It would be simpler to reconfigure the first row up front with those business class seat and business class passengers would be satisfied.
This older Toyota has 3 row of seats that can accommodate 3 adult per row, so 9 adults plus up front the driver and 2 adults. ( note: the middle seat is small )
So 12 occupant is normal. As children are smaller they often fits 4 in the back rows . So 14 is over the safe limit.
Not really safe but it is a fact here.
For this type of documents I always use EMS or DHL.
And DHL need a street address not a PO Box.
DHL is always quicker for me for shipping document in Canada.