summed it up nicely. As far as visa issuing is concerned we can not add more. Please make sure you book appointment for apply the visa and book appointment to pick up passport.
they should be denied entry into the premises and barred from applying a visa. Have some good manners and show respect. That's the minimum Thailand can expect from it;s visitors...
We not have trips to HCMC, but from customer we hear following: if you can proof bank statement three month, good enough skills than HCMC is OK. Penang, Kota Bharu even Yangon too. Vientiane is OK, but they observe the one full year rule. Savannakhet no. Did not hear anything from Phnom Penh (best avoided anyway). KL & Hanoi is a no go for ED (IMHO).