it's not a legal immigration office. It's just a bunch of lawyers who make money and are dodgy enough to make their website address look like a part of Thai embassy when they are just a lawyer firm nothing to do with government at all.
Do it every 2 weeks via Singapore from Perth luckily Perth is only 1 hour ahead of Thailand. Still 12 hours after leaving. Just used to flying been doing it so long.
Must be hard adjusting when one doesn't fly often and big time difference.