Hi there Daksha 

Well its not compulsory to fill the choices again after 1st or any round. However, if you wish to change your preferred order then you can update it after every round of counseling. I would personally recommend you adjust it a little bit according to your rank if you don't want to freeze your seat. 

Thank You 

Hope this helps 

hi daksha,

please elaborate your query and provide all the necessary details regarding it