The notice makes a particular person the attorney of record for purposes of communication and service of process. But as a practical matter, the attorney of record is often assisted by other attorneys from the same law firm. So in your case, you could expect that the original attorney may continue to do work on the case, unless the original attorney is leaving the law firm.
The original attorney may or may not continue to be involved in the representation of the respondent. The case may have been assigned to another attorney, or the attorney may have been re-assigned to a different office in another city. Either way, this shouldn't cause any delay in the case.
DISCLAIMER - THIS IS NOT LEGAL ADVICE. THIS IS FOR GENERAL INFORMATIONAL PURPOSES ONLY, AND DOES NOT APPLY TO ANY PARTICULAR PERSON OR CASE. NO ATTORNEY-CLIENT RELATIONSHIP IS HEREBY CREATED.
Yes. That is exactly what it means. Routinely attorneys leave firms. The firm is still representing the client in the defense of the matter. So another attorney takes over primary responsibility for the defense.