A family of Microsoft word processing software products for creating web, email, and print documents.
Hi Kim,
I will assist you with the issue you are facing with Word documents.
Create two new test documents and perform a test. Check if the issue occurs.
If you are able to reproduce the issue, then share the documents which you are facing issue with on the SkyDrive, so that we can check and assist you better.
You may also refer to the article to know on how to merge the document along with comments:
I hope the above link helps.
Thank you.