LinkedIn has been similarly creepy to me. Someone I have never met with whom I share zero common connections has begun showing up in my recommendations because I viewed their profile once months ago.
LinkedIn once suggested someone with the same (very uncommon) name as my neighbour, but it wasn't actually my neighbour. I have never contacted my neighbour electronically. Either a weird coincidence or it somehow worked out I know someone with that name, somehow.
At least there you know why Linkedin thinks you may know them, and you don't know them so it doesn't really matter. What I care about is that it figured out my entire family tree without much to work with.