Sadly, spelling and grammar errors are more common than ever, which is surprising considering how much more people communicate through writing with texting and technology, these days. You can see it at its worst in the news media.
As an educator, we teach Habits of the Mind to our students. One of them is "Communicating with precision and accuracy." This is needed now more than ever, and it is important for students to realize that accuracy and precision are not just expected in the content, but in the communication itself, in the form of proper speech, grammar, spelling, and punctuation. It is a worthy effort, I believe.
If I ran a company, I would be sorely embarrassed by something like this and some folks would be helped in a way that made sure it didn't happen again.