Right, this is very much a feature not a bug. I have friends who do corporate customer service through Twitter and the feed would be a disaster if every respons

Right, this is very much a feature not a bug. I have friends who do corporate customer service through Twitter and the feed would be a disaster if every response or "@" to someone was in the main stream of tweets. It still shows up if two people you follow are @ing each other, which is a great way to jump into the conversation if desired.