Unfortunately sharing the same account to track time is not supported. We don’t support tracking time on multiple computers while logged-in to the same account. You would have to stop the timer on one computer before you start another. Using the same credentials/account to track time on multiple computers at the same time will make time reporting inaccurate since one timer will override the other.
Example: If the timer is running on your laptop, then you start the timer on your other PC, the laptop timer will go idle (if unattended) and stop tracking time. As a result, the laptops time will be overwritten by the time tracked with the other computer, thus loosing time.