Why did I receive two Entitlement Certificates for my PLTS Software? And why are the certificates different?

The first certificate is used to request the PLTS license. The second certificate is used to setup the software update service (SUS) for PLTS. The SUS automatically notifies the user when updates to PLTS software become available.

One year of software updates is included with the initial purchase of PLTS. Upon expiration of the first year, software updates are acquired via Agilent model number N1930U which extends and renews the SUS.