@Nick ***********
Can't talk of provincial immigration offices, I only have experience with Bangkok, but I find that if you get the current list and present this with the ticks next to each criterion, there's never a problem (not for me or the handful of old codgers I've helped out). Thai immigration is very anal, and I've found that if you have everything presented in the right order, with one copy of each original document, it often elicits slight smiles (not full blown ones) when the officer is going through the stack of papers. Fortunately (for this instance) I'm a little OCD so it helps that I must have everything in order anyway. The other thing in my favour, is my complete anti-visa agent stance. I simply cannot justify throwing money away!