Notification trouble, I think?

Hi all. Since the latest 10.2, something seems to be popping up, and I can't figure out if this is a messages thing, a notification thing, or both. Recently I got the automated text from amazon, my order was shipped. I deleted this message, but now it seems like it's stuck. Not all the time, when I push the sleep/wake button to power the device to unlock, i see a "messages, two days ago, your amazon oder..." I don't understand whyt his is here, when the message is absolutely gone from the phone. Using iPhone six S plus, latest IOS you know the drill. I have seen this behavior even when the notifications have been cleared out. Thanks for any help.