So for about a month, my notification bar will randomly pop up with 5 or 6 pictures I've downloaded which I've deleted. I've tried clearing out the notifications, checking the 'downloads' app, checking the 'files' folder, I've took the battery out for a while, even tried cleaning the cache. Nothing will work and it is very annoying. Has anyone had this problem or know what it could be?

Here are some pictures of what I'm talking about: