Facebook had lists. I was happily using them. Then Facebook added more lists with default names, with no way to delete them. Now I'm never 100% confident I've got everyone in the correct list. Who knows what will happen the next time they update?
Facebook pushes the their new lists, while ignoring the old ones. I'm constantly suggested to add people to the new lists, but not to the old ones. I started doing this, not realising the lists were different, as my old lists have the same names as the new ones. The only way to distinguish between them is the new icon. Facebook's list management tools don't make this easy to fix up.
