If you have more than one browser installed these updates may be for both the IE, and non IE versions? To see if you already have both installed you can check in Add/remove programs (or Revo if you have), and they will show as in the image below;
You can check the latest versions for both at FileHippo.com; Flash Player (IE) Flash Player (Non-IE)
Go down the lists ignoring RC/Beta versions to find the latest stable releases (unless you are confident otherwise).
If you would prefer to manage Flash updates manually you can stop the auto update notifications via the Adobe’s Settings Manager
If you use any third party cleaners such as CCleaner to clean Adobe Flash Player items this will reset Adobe’s Settings Manager to it's defaults, each time you clean, and therefore you will continue to receive Flash update notifications.
Hope this helps you.