That's the problem. They are hard to deal with and they don't give a shit what you are going through. I had 2 transits - first 4 hrs which got extended to 10 hrs for which I got transit-visa stamped, and the other 12 hrs which was also extended because of delay - 2 days. They didn't tell me I needed another visa when I was sent to the hotel but at the time of departure, they were reluctant. Thankfully, I had chinese speaking nepali friend with me (whom I had met in the hotel). He explained them the story and finally let us through.