Can you post a screenshot of what you’re getting? Use the camera icon in the forum web interface to do that.
Can you also check the Reference pages of your Index file and look at the IX Reference page. What is the entry(building block) for the IndexIX paratag and the font format used in the paratag and any character tag applied to it as well, i.e. the <$pagenum> entry?
FYI, images attached in emails are not passed through by the Forum software. You need to post online using the camera icon in the editor to include an image.
It sounds like you may have an unpatched version of FM10. The latest release was FM10.0.2 and is available here:
[Note: you need to apply all patches in release order.]