Problem 1: they don't keep track across devices. If I log in from one web browser and see new notifications, it's not uncommon for me to then log on via a different web browser half a day later and some of those notifications are back to being new again. Bah. What does this have to do with this "news" from TFA? Apparently I was part of the "test group" unfortunately, because I've been getting this out-of-order crap for a long while. If I check twitter from my phone in the morning and catch up on everything, then in the evening I have to wade through a lot of "while you were away" crap that was posted days ago despite my having logged on hours before, and then I can't find what was actually posted since the last time I was logged on...that's not "confusion." That's a mix of "completely idiotic UX," "very poor backend tracking of what has already been viewed," and "extremely poor guesses as to what I might be interested in, elevating feeds in which I'm only marginally interested while obfuscating those in which I have a lot of interest." I suspect that third one has to do with how many likes/whatever the person has, but...sometimes people are interested in someone for different reasons. I follow comedians, and if personX is funnier than personY, but personY looks awesome in a bikini, then that doesn't mean I want you to blare personY's posts at me and hide personX's posts... I'm in SoCal, if I want to see a really fit girl in a bikini, I walk outside and look in any direction.