Spot the Error(s) in This Writeup

This is a post by a Facebook user. Despite the fact that he made use of shorthand or abbreviation(which is allowed on social media), the writeup still contains grammatical blunders that cannot be overlooked. Can you spot them?

Do you know that a professor of English can still commit this blunder? That is why we have proof readers and editors. Nobody is above the embarrassing embrace of the language. I love the English Language!