Reason:

1. System delay: Amazon's brand name modification process may take some time to update the system and correctly display the latest brand name information.

2. Caching problem: Your browser or application may still cache the old brand name information, causing the new brand name to be unable to be displayed correctly. You can try clearing the cache of your browser or application, restart the browser or application, and refresh the page.

3. Violation of Amazon brand policies: Amazon has some brand policies, such as prohibiting the use of unauthorized trademarks or logos. Your brand name may be rejected or not displayed if it violates these policies.