Questions as well as answers (unless the latter is specially checked to post to blog) show up as comments on Steemit along with a link to view the question or answer on Musing.

Why that would be is to bring people to Musing and keep them here as much as possible.

The reason why a question might not show up as a blog post is because only the question and whatever other information the creator might impart would be all that shows up there. It's possible then, that the conversation (or the answering of the question) would take place on Steemit rather than on Musing.

The way things are set up, when someone chooses "post to blog" for an answer, the question becomes the title to that post.

Also, if you go looking at the Musing blog, all of our questions and answers are showing up as one very long post of multiple threads.

I imagine it was set up that way to keep the focus on Musing, but yet try to let those on Steemit know that Musing existed, and then provide a way via link to get to Musing, hoping a percentage of Steemit users, just like any of the newer dApps would crossover and use Musing, too.