Sure: a third reason might be because leaving low-level posts on friendliness on the top page encourages people to misunderestimate how difficult friendliness is, which might lead them to trivialize the whole project, donate less to SIAI, and/or try to build their own non-provably friendly AI.

The interesting question is why you would remark on writing style if the third reason were your true objection. Maybe you've got some other objection altogether -- it's not that important to me; I like your blog and you can move stuff around on it if you feel like it.