because the employer (usually university)need to input your personal data into "Sevis" system for security reasons. and the Embassy need to check your data in the Sevis system before issuing your visa.
so, if you deal them at the same time, the system should have some warn, such as"same data has been inputted."
of course, i am not professional and not 100% sure.
so, if you deal them at the same time, the system should have some warn, such as"same data has been inputted."
of course, i am not professional and not 100% sure.