Word track changes problem

I have a new Mac laptop. I recently used Word track changes to edit a document. When I was finished I accepted all changes and sent the document. The document I sent looked clean, but when it arrived to the recipient all the edits were showing. This is a problem because my professor gave my paper a 0 because he thinks I submitted a rough draft. Is this a common problem and what did I do wrong? Is there a way to prove to my professor that this is a software issue? Thanks.

Get him to turn track changes off. Sounds like he had it turned on when he received your copy.