Cannot delete photos from my downloads gallery

[Cosmo Neopolis]

I have photos in my Downloads that I am trying to delete. At first they appear to have deleted, but, right after, they reappear. This has been an ongoing problem for a while now. I've seen the same problem with people using automatically syncing photo services, but these are just regular downloads.

 

[GTWalling]

If you use Cloud storage to store and sync your pictures (Dropbox, Google etc.) they could be putting it back on.