That's how https://tweetdeck.twitter.com/ works. You have a Home column, which is strictly things the people you follow have tweeted and retweeted, in chronological order; and you have a separate Activity column for those other things (and optionally more columns for searches, lists etc.)
I honestly wouldn't mind seeing that stuff if I have a, "Oh, what else on here is good" feeling. But it makes me crazy that they keep insisting that I really must want to see it right now, when I am very sure I don't.