EAD를 쓴다고 해서 이민국과 학교가 실시간으로 이 사실을 파악하고 체류상태를 업데이트하는 것이 아니기 때문에 생기는 착각일 뿐입니다. 아무리 말씀드려도 안믿으실 것 같아서 아래 링크를 남깁니다.
“A person who has filed for an I-485 and who uses an EAD will lose valid non-immigrant status. An F-1 student or H-1B visa holder who does this will be considered to be in I-485 pending status and out of F-1 or H-1B status. If the I-485 is denied, then the applicant cannot remain in the U.S. and will have to leave.
If, however, the applicant does not use the EAD, he/she will be able to retain his/her visa status and remain in the U.S. for the duration of his/her non-immigrant visa, even if the I-485 application is denied.”