I arrived at DMK yesterday as well (Sunday 9pm), and heard an officer yelling ¨How many days are you going to stay?!!¨ immediately moved to a line far away and the officer welcomed me with a smile.. It totally depends on the person you get
No, "Valid Until" should be a date 5 years from "Valid from", and visa type should say: DTV. That's how mine is. They made a mistake or just gave him a short term tourist visa
Yes you can, but you need to be aware of the risk of being called to an interview. In countries like China they check your entry-exit record. My wife is Chinese, she did it and had to return to China to get the visa approved (even though no interview was necessary). She just had to be in China to have it approved