Word 2007 text formatting tags are copied along with the text. This results in extra tags in the HTML that are neither required nor understood by the editor in some cases.
Copy your Word 2007 text to a text editor such as Notepad. Once you have pasted it into the other text editor, copy the text from the other text editor, and paste the newly copied text into the Document Template.
The extra step removes any formatting tags associated with the text and preserves only the text itself.