When using EndNote to format your paper, you need to use specific commands to make any edits to your in-text citations and bibliography. This tutorial by EndNote explains the reason for these special steps and gives instructions on how to do them.
To use the Edit Citation command in older versions of MS Word, watch this tutorial or follow these steps:
1. In your Word document, select Tools → EndNote X6 → Edit Citation(s)
2. Select the citation you want to edit in the scrolling box on the left
3. Make the necessary changes
4. Click OK
*NOTE: The EndNote Library you're using must also be open