I think you need to iclude condition with Certificate plugin. For example, Student need to complete 80% of the course content to beable to download and get the certificate. At the moment, you can generate the Certificate at any time.
2. Some how student can’t see their Progess report, with Progress report plugin. I think not only the instructor but also the student can view the report.
3. And I’m still waiting for documents on how to update the site to latest version of Teachify :()