thanks. I did use an agent and 800k appeared for a moment to get the 90 day and we got the extension and ME same day but I didn't load my 800k in until a month into my extension so only had a balance about the last 10 months. Didn't realize about the year balance for renewal.
hmm the few rare times I was asked for my return ticket before boarding in USA it was outside the 30 day exemption I would get on arrival. One can always get another 30 day extension in Thailand so I'm suspect the airline would only allow a return with the 30 day default..