The icons of people I'm following, on the sidebar, are not a multiple of 6 -yet there's friends I follow who are not present!

I'd really love to be able to manage the icons -choose which / how many to show, or at least let them all show. My own son is not on the icon grid! And yet, the icons are not even but there is space for two avatars more!
 
sad I’m frustrated
Inappropriate?
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