@Bobby ***
Thai consulates in other countries are NOT run by thai immigrations :O They are run by the Ministry of Foreign Affairs office and they let the consulates have a lot of freedom as far a who they will sell what visas to and with what documentation.
Inside the country the immigration offices are part of the Royal Thai Police and they are closer to having a sort of standard as far as the requirements etc for issuing visas and/or extensions
Although with that being said there are over 70 immigration offices inside the country and they can do things pretty differently too.. :(