Thank you for posting the link to the blog where you found this paragraph.
Unfortunately, the author is a shining example of how some students can make it to the university level without the slightest notion of good grammar, spelling or writing. It is a harsh reality that many are pushed through the educational system and arrive at undergraduate levels with the reading and writing skills of an elementary school student.
Remember, this is a blog on the internet and you should never expect good writing from random articles uploaded to personal blogs. This is not to say that all blogs are poorly written. Many are very well written and researched. Just don't expect them all to be good just because they are on the net.
Student or Learner