Ok. That at least makes more sense but bowing was one of the things listed in the article referenced in the OP. However, he also apparently noticed she was behind and corrected it.
The real newsworthy part of this is the parts of the media that went totally wild over this, as if thought it were a real thing…and the media followers who jumped right in.
Its pretty obvious there were a lot of people who were waiting in eager anticipation of some faux pas and when it didnt happen went with that lame thing.