My experience of Facebook is limited so I'm not sure what I have to offer will be useful. However, people I've searched come up, people in my phone contacts sometimes come up even though my number isn't on my Facebook, (My landlord - no friends in common) but then again there are also complete strangers suggested with no friends in common.
I haven't read all your threads so I don't know your story, but I can relate to feeling like the universe is playing a cruel joke on me. I feel like I'm irony personified some times.
How are you now? I know I'm late on this thread.
And thank you for your reply on my thread