Did you update them through iTunes? There has been a bug for years that if iTunes updates the app on your device, the badge icon doesn't go away.
There are a few things you can do here. And yes, as above there is a bug, whereby if you use iTunes to update the apps then the badge can stick.
The way to clear this badge and the list, delete each one of the apps listed in this list... Re-download them and it should then clear it out. Oh and, if after updating, you want to clear the installed list of updated apps, simply set the date to at least 30 days in the future, and click back into the list, it will clear. Don't forget to set your date back once done.
FYI, only use the App Store update feature to update your apps, and not iTunes. This will circumvent a future repeat of the issue.
Good luck.