Fb says friends share photos with me when they don't?

[pearl]

So just now my phone had bad internet connection, but it had said that one of my friends had shared photos with me 5 minutes ago, and this rather surprised me because 1) I knew my friend would be sleeping by now, and 2) the pictures were of a Korean pop group that we had had arguments about before (yes, we argue over kpop lol), so she knew not to post it on my timeline. I called her, and she was just waking up! She said she had posted no such pictures.

Does facebook ever say that your friends randomly share super old pictures? I recognize one of the pictures as one I messaged to her a while ago, but the other pics I don't recognize at all.

Help????


Thanks!