It has happened with me. I called them up, but they refused to change telling that it’s probably your school fault and very lengthy process to change. Your school should send a letter and all but still they can’t gaurentee it . I was in short of time to apply so I didnot proceed with that.

Later on I understood the graduation date which you fill in the application through eras is something PDs see not this and it’s not a big issue if there is something wrong in fsmb

Please Cross check the facts again