Sad to say many articles are rife with sloppy errors such as 'their' for 'there', 'site' for 'sight' and vice versa. Misspellings are as common as winter snow in Bangor, Maine.
Sadder still is that these errors go undetected and seem not to count against the author in the scores.
To answer this question I selected a random hub from a hubber with a score of 93 and lots of articles and followers. It took only two paragraphs to get to his/her first misspelling. Here's the word, "querries ". The word is properly spelled "Queries".
If such writers had ever worked in journalism in the days when newspapers had editors; they would quickly have learned to spell or find new employment.