Hi Brett,
How long has it been since you did the rename? Often issues like
this will be resolved in 24-48 hours so time might still solve the
issue. Other than that, are you logged in and seeing the renamed
user's calendar wrong or is she logged in and seeing it wrong?
Screenshots might help also but in general, GAM just sends a command
to Google's servers to do the rename, it doesn't interact with the
various services. If the problem persists, you might need to contact
Google's phone support to get it resolved.
Jay