Due to the advice I've read, on aseanow, I will plan my trip accordingly. JFK-BKK (25 days in Thailand) than BKK-PNH (6 days in Cambodia) than PNH-BKK (23 days in Thailand) finally BKK-JFK. Total 48 days in Thailand and 2 visa exempt entries.
I called my airline, about these plans, but was only told, by phone rep, the check in personnel have all the international "customs" regulations.
I think if I have all the paperwork, I'll get by airport personnel.
Tried getting 60 day visa, through website, but couldn't make it work and couldn't find an agency, in NYC to do it. I was told by one of them they wouldn't do Thailand visas because it was to difficult and time consuming.