This article shows you how you can easily see the changes
The changes are made correctly, however, the cache on your computer can store the old version. The cache is stored browser history and cache can happen to create some minor 'look a like-bugs' when showing your banner. Therefore, it's local on your computer so the changes are made and are visible on other computers.
For you to see your changes you have to do a clear cache.
Written Step-by-Step guide
1. Follow these two images
You can also check your banner in incognito.
Happy checking your banner! 👏