Image less contact confuses me

In facebook if you search friends you'll get friend list along with thumb image next to it. The thumb image helps you lot if there are friends with same name. e.g. see this image:

Here I searched with 'Moni' and it listed down two 'Monirul Islam'. As there are thumb images with each Monirul Islam, I can identify who is who.

But this same facebook does not show thumb image when I'm going to share something with my friends. See this image:

FaceBook's suggestion is not correct

I frequently get friend add suggestion from facebook. In the given image, the colored person is in my add friend suggestion list. I followed direction on how to add but it always shows me that she has too many friends and cannot accept new friend request.