Old notifications keep coming back on my iPhone

Hey there kavin241, 

If you're having problems with notifications, you may want to review your settings to ensure everything is set up as you'd like.

Change notification settings on iPhone   

You may also want to check Access features from the iPhone Lock Screen to see if this is what you're experiencing.

"See earlier notifications: Swipe up from the center. (See View and respond to notifications on iPhone.)"

Cheers!