Latest questions about "best friends"

I used to be able to see one of my friend's best friend list when you tapped on them. How do I do it now? All it shows is their total count.

I like to keep my number of best friends at 3, but I just updated it with the very latest update (9.3.0) and the number is at 7 again. How do I change it back to 3?

I don't Snapchat anybody but my girlfriend, so why are other people on my Snapchat's best friends list? I've never even Snapchatted them. How does it work?