Someone who has read his material would be likely to repeat the same analogies and trivia.

As for the hyphen errors, they are common for people for whom English is their second language. I commit hyphen errors similar to what is described all the time because English hyphenation makes absolutely no sense. In fact, reading the list of examples, the mistakes listed makes more sense to me than the correct way of writing those.

I also switch back and forth on a lot of the phrases the article mentions.

I also switch back and forth between US and UK spelling, because I learned UK spelling at school, but was far more exposed to US spelling in practice.

This seems to me to be exceedingly weak.