Why do I suddenly appear only at the bottom of EVERY friend's "friends list"?

[Charis Floccinaucinihilipilificator]

As we know, the order your friends appear in the friends list indicates roughly the level of interactivity between you.

Some time ago though, I noticed that, for no apparent reason, I had suddenly fallen at the bottom of the list of every single FB friend of mine, regardless of the level of interactivity. So, I only appear at the bottom of lists of people I communicate with every day. Why did this happen? How can this glitch be restored?
PS. This wasn't the case some time ago. I had performed the same experiment a couple of months ago and I was at the top of some of my friends' lists and in the middle of others. A month later, suddenly, I was at the bottom of everyone's lists, although I still communicate a lot with some of them. It's just NOT LOGICAL to happen, since at the bottom are found only friends that this person hasn't communicated for a long time. I communicate with these people every day and I'm still at the bottom.

And, yes, I know the others don't see the same thing. But I obviously care about what I see.

[abraXus]

first of all, why does this even matter?

obviously the other people have more in common with the person than you do - maybe they are liking more of the person's items, or leaving more comments, or they have more interests in common

and keep in mind that when other people look at someone's top friends, they see something different than what you see