OneDrive for Business Sharing Permissions Issue

We recently started using OneDrive for Business. Yesterday employee A shared a file with employee B using the "specific person" choice from the drop-down. Employee B was given edit permissions. Employee B then shared it with employee C successfully. The Owner of the file, employee A,  was not notified and did not receive a notice to Accept/Deny permission to employee C. When we did a similar sharing, but with only View permission, notifications were sent to the file owner to allow it. Surely this is not how it is supposed to work with Edit permission. The Owner of the file can never share with editing permission without risking the file is shared without her knowing it. 

Thank you in advance for your feedback.