Hello student

hope you are doing great. As per your query  I would glad to tell you that when you have been alloted seat in any stream in any round of counselling then only you have to pay your seat if you are statisified and doesnt want to upgrade but if you want  to upgrade then you can simply go for next round without paying the fees , so you will have to pay one time only in the counselling

Hope you found this answer helpful. Good luck for your future