We recommend that Administrators also have a counter-part learning account, this is to ensure all learning is recorded and logged correctly to meet any compliance requirements you may have.
In particular, the Quiz activity type will not record an Administrators attempt due to this being forced into preview mode by the system. The preview mode is used for editing/testing purposes.
It was possible on our older platforms (pre RoadMap) to record learning on an administrator account without problem as only scorm based activities were used. With the RoadMap platform we utilise many more activities and resources within Moodle and the Administrator level permissions will automatically force 'preview' or 'edit' mode in some of these and therefore prevent progress from being recorded.