Do you use Trusted Tickets? I believe you are encountering one of the known problems when working with embedded views. Since the VizPortal process is the thing that records that a user has viewed a Viz and when you embed a Viz it bypasses the VizPortal process and doesn't record the user as having viewed that page. This article may answer some of your questions: Traffic to Views Does Not Record Activity for Embedded Views | Tableau Software If this is not the case, it may require more investigation by Tableau Technical Support.
Hope this helps!