Because my blog and the community - any community - are two different places, like your house and the supermarket might be.

Now I get why I have my blog and my posts and finally understood why not all of my posts are shown on my blog. Still tricky. I was wondering why I can resteem my own posts, but now it makes sense. I guess I will have to resteem the ones that are posted in communities to have them on my blog as well. We wanted communities...now we have them.