Question about facebook blocking.?

[Rachel L]

The last type of interaction I had with a facebook friend was when I sent her a chat message. I wasn't home at the time so I just let it be and check my messages when I got home. I got home and I noticed she unfriended me and her profile picture was blank, I could not send her chat messages, or search for her. I archived our chat history in case I ever want to refer back to it for what ever reason. Several days later I accessed my archived messages looking for someone else and I noticed at a glance that one thing changed which is that I could see her profile picture. Several days before that her profile picture was blank, otherwise everything else stayed the same. I am just looking to find out if there is anyone who might know why I could not see her profile picture when she first unfriended me and then several days later I could? I don't appreciate sarcastic and rude answers so if you are going to be that way don't bother answering.
I can now see here profile picture but I still can't search for her or send chat messages.