Various problems:
- some commands have a separate text and math definition, like \overbar and \underbar. Unfortunately, both are instances. And there can only be one on a redirect page.
- mathundertextextensible appears to claim all of the instances of mathunderextensible.
- mathovertextextensible appears to claim all of the instances of mathoverextensible.
- \margintitle is not in the xml files