I've seen something like this when doing Saturday Sourcing.
I've noticed profiles that seem familiar on the week's Unsourced list, and when I look further, find that I edited them in the past to add sources and remove the Unsourced tags.
My "fix" is to edit the profile, add the Unsourced tag back, then save. After that, edit again, removed the tag I just added, and save.
Not elegant, but it seems to work. At this point, I'll see the profile disappear off the current Unsourced list when I refresh the screen. I've noticed this periodically since the update that happened some weeks ago.