Cache lets web browsers download only the content that has changed since you last viewed a webpage, instead of downloading all the content every time that the page is displayed.
Issues faced with the cache:
Thus, you'd have clear your browser cache to see the updated web page as the older cache item is interfering.
To clear browser cache for:
Go to the customize and control icon, and click on the settings.
On the settings page, click on “Clear Browsing Data” to clear cache.
To empty the cache memory go to the Safari menu and click 'Empty Cache…'. You will be presented with a window explaining what will happen. Click OK to proceed.
Note: In many cases emptying the cache may temporarily slow down Safari, especially if you are on a slow connection.