Steps to follow to reproduce:
- create a new page using the browser
- write some content
- save the new page
- create a new page using XWord. The name & space of the page should be the same as in the previous case
- write some different content
- click "Publish document"
Result: The page created with XWord overwrites the page created in the browser.
Suggestion: When creating a new page from XWord there should be a check to see if the page already exists.