Earlier quoted context omitted.
Except the list doesn't show more than 200 tweets (unless there's some trick to avoid this). If there's a sudden spike of activity, or you check it only once a week, it's easy to miss something important.
Sounds like a feature. If it is important you shouldn't rely on twitter to find about it anyway.
Twitter is kinda weird in that there are some blindly obvious UX improvements everyone is aware of that Twitter refrains from because the poor UX is subsidizing their business model.