Yes, I noticed the same thing when I tested the audit program on a test database. I don't know why the "rename" step (or whatever the system REALLY does) is not in the audit.

However, I was a little disappointed to see that what I THOUGHT would be an audit of a column change turned out to be an audit of a change to the table.

While I can understand that column changes might happen by a different route than what I would have thought, column changes are the type of audit that I really wanted to track, so this method turns out to not help me much.