In your backup environment data clone going to a disk media, I suspect that we are rarely will see a save set with clflg mminfo attributes. The reason is that 'faulty/aborted' save sets will automatically be deleted.
If you want to know whether a save set has successfully been cloned you better check with 'validcopies' mminfo attribute:
mminfo -r "client,name,ssid,validcopies,pool"
or to verify all save sets with only one copy
mminfo -q "validcopies<2" -r "client,name,ssid,validcopies,pool"