How should you handle an interview if you completed process and they passed on you formally and then they say they made mistake and want to meet with you again?
If you are still interested in getting the job, take the
interview seriously. There must be a reason for the employer
wanting to see you again. As for the 'mistake', it may simply be
that their first choice and reserve choice have turned the job
down. If so, it wouldn't necessarily mean that there's anything
wrong with the job itself. For example, they may have preferred a
position that didn't involve relocating. In any case - good