The errors I saw (before giving up) would not be caught by a spell check. I'll go so far as guessing that a blind spell check was run, with no human check on the corrections.
Or English isn't their first language. That was my impression. Granted, I bailed partly because of the grammar, too but that was after realizing it was a mixed list of soft skills, not algorithms or tools or whatever. Once it wasn't what I expected, the writing didn't help keep me.