Linguist here - Never forget that grammar & spelling come second - the former exists to describe the language & make it into easy rules for learning & comparison to other languages. Spelling is pretty much only consensual and changes every couple of decades. So don't get hung up on either, you sound insufferable when you criticize others on the basis of grammar and spelling, especially on a social media post. As long as you understand what's being communicated, the speaker did his job. A living language is always changing and usually takes the easiest road (which includes spelling homophones the same way! Bless. :)