I-485 for primary applicant was approved on November 20, 2008 and GC was received in mail. Today both primary and derivative (who was waiting for approval) received e-mail that both I-485 cases were transferred to NBC for standard interview. Primary left employer that sponsored him for a green card five months after receiving the green card becuase employer wanted to relocate him to another state. How this can affect primary's green card considering that online status changed and that derivative also received a notice for the interview? I-485 for both primary and derivative were filed in March 2008.