Steemit seems too locked down and unnecessarily tightly integrated. I noticed the same issue when I was there. There was a Twitter like integrations dapp I used, and all the tweets keep appearing on my Steemit page that the watchers there commented on my account that I'm spamming.
But with the way Steem and Hive seems more like close cousins, I feel anything possible here should be there also. Thus, the developers are simply lazy or are yet to figure out a proper implementation. They could learn from Leothreads and even D.Buzz, among others here.