If you need to edit or remove a time session, you can do so by clicking the description/summary of the session from either your Time Tracking page, or from any activity feed:
You'll then be taken to an edit page where you can edit all the details of the session including its summary, when it occurred, the time and finally the billing group. Just change any information necessary then click the Update Time button to finish. Otherwise, click the Delete Time Session button to remove it.
