Sometimes when a change is made to a webpage, your browser will show an older version of the page. This is likely because your browser has shown you elements from it's cache.
Briefly, your browser's cache is temporary storage location for images, CSS, scripts and other web elements. Your browser stores these file for a short time (anywhere from minutes to a few days) in order to speed up the website that you are viewing. this is why you will sometime see an old version of a webpage when you have just made changes to that page. There are a few ways to force your browser to retrieve fresh information.
This article discusses how to clear your browser's cache to force fresh information. It is not an exhaustive list, but covers many popular browsers used today.
If clearing your browser's cache does not work, the content is likely on a CDN, and you will need to wait until the CDN refreshes.
On your computer, open Chrome
At the top right, click More
ClickMore toolsClear browsing data
At the top, choose a time range. To delete everything, selectAll time
Next to "Cookies and other site data" and "Cached images and files," check the boxes