They do seem to be in some sort of order. When I compare my "Followers" and "Following" lists they are in more or less the same order. This allows me to check fairly quickly who has unfollowed me if I open two windows with Followers in one and Following in the other. Also, there is no need to keep checking these lists. On your profile it gives the number of followers you have. If this number goes down for whatever reason, then it's worth doing a check. I had one guy unfollow me simply because he's a Christian and I'm not. I guess that level of tolerance is what can be expected though.
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