If the voice narration is out of sync with what you are seeing on the screen, this is caused by navigating away from the lesson while the course is running. You must watch the lesson and not open other browser pages while the lesson is running.
To solve this problem, you will have to close your browser and re-login to the course lesson. You must watch the lesson and not open other browser pages to complete each lesson.
We recommend that you complete each lesson quiz to ensure your spot in the course is saved.
At the top of the lesson page you will see:
NOTICE: To complete this training you must watch each lesson video and pass the quiz at the end of the lesson to progress in the course. Your attention is required. Navigating away from the lesson popup window during your attempt may impact the system's ability to track your progress.