still wrong. A good example is Australians on a basic pension. They are not taxed on it in aus but would be taxed in Thailand. They would therefore be worse off. Also they might have been taxed (pre deposit) on their retirement savings (superannuation) in aus and not taxed again when they withdraw it in aus, but if they withdraw it in thailand, taxed. Just a vague example. Having a dta isnt the saving grace, its what the dta actually contains thats important.
Very common. Consider it certain. But if you are ready with your paperwork and have real answers and are confident then you wont have issues. They are basically just going through a tick and flick process. I went through it and was fine.
Email your embassy and check. I did medical soft power and i sent emails to check with my embassy direct. That was very helpful and saved me alot of headache and rejection as they had more sepcific requirements than outlined in the general requirements.