No difference as the status of a live eticket number within your booking ref allowed you to check in.
Had the reissue not taken place you'd have received errors during the online check in and not been able to perform this successfully.
Worth also mentioning the underlying airline ticketing rules set by the airline dictate when a eticket needs to be reissued and not simply revalidated. It doesn't have anything to do with incompetence on the part of an agent not knowing how to carry out one or other.