Hi,
As my experience, this behavior was by design.
Customize the Office fluent ribbon may accomplish your request, see following articles:
How to: Customize the Office Fluent Ribbon by Using an Open XML Formats File
How to: Customize the Office Fluent Ribbon by Using a Managed COM Add-in
How to: Customize the Office Fluent Ribbon by Using a Visual Basic COM Add-in
According your description, this issue is more Office for developer related. In order to get the answer effectively, it is recommended to post a new thread in Microsoft Office for Developer Forum(Word for Developers or Visual Studio Tools for Office) for further
discussion.
http://social.msdn.microsoft.com/Forums/en/category/officedev
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us.
Best regards.
William Zhou
TechNet Community Support
