Most of the time problems with changes that you make not showing up are caused by your cache. Either it is caused the cache functionality in WordPress, a cache plugin or your browser’s cache.
Clearing WordPress’s cache
If your site has a cache folder it will be located in your wp-content folder (wp-content/wp-cache/). Delete any contents of this folder and reload your site.
Cache plugins are a great way to speed up your site, but sometimes they can prevent changes you make from showing up. Read the documentation for any cache plugin you have installed to see how to clear the cache.
Browsers cache data so that next time you visit a web page it loads faster. To clear your browser cache click here to find instructions for your specific browser.