Hi,
So first, when you do an update on your website please make a backup so that you can restore if you find a problem. Also, a good policy is to first try on a copy of the website, just to make sure that it will be ok after that. That way, your won't have your website broken for several days if a problem happens.
Now regarding your problem, as Mohamed is hinting at, based on what your saying and my tests on your website, I also see a problem of caching on the website. We'll need a backend and FTP access to the website to be able to check your settings and see what's going on.
Please use our contact form to provide them.