Problem Resolved.
Hint: 1300273 - SAP_COLLECTOR_FOR_PERFMONITOR: New architecture as of 7.20
The system was scheduling additional background jobs so even if SAP_COLLECTOR_FOR_PERFMONITOR ran successfully, the other background jobs need to be checked. The job was executed under a dialog user (bad practice) which did not have the authorization to release jobs. By switching the user to a dedicated batch processing user, we were able to get statistics to show up.