because it was translated from English to chinese back to english. Take your post, put into babelfish in chinese, then put the chinese back in to babelfish, see what happens.
Most likely Luther & Rafer just talked to a recorder and their contact in Sina.com typed out for them. Sina.com is the Yahoo of China, only bigger. Celebrities routinely blog on Sina. So I don't think it's fake. otherwise it would be put up there in their name. We gotta remember, they are professional athletes, not professional writers. As a fan, I'd rather read their own writings, even imperfect ones, than some PR polished, lawyer sanitized fake diaries.