So a hell of a time to find this out but anyone who has read my writing can tell you my grammer needs work. Come to find out though I might be mildly dyslexic. I never thought is was possible considering I can speed read a book in a day and have never had any trouble reading. I constantly mix up the words saw and say when I write so I decided to see if anyone else every did the same. They are not homophones which I also struggle with anyways but that is more common. Turns out saw and say are a common mix up for dyslexics. Another that I read about that I fuck up often is the words who and how that have the same letters. Some how I made it through high school and years after without anyone ever catching it. I am a little late in life to be learning this is a possibility but it is what it is I suppose.
Yeah, the quality of your output in terms of story and all the mechanics that go into it is generally superior enough that it catches me by surprise when you get these spelling "mistakes". I had wondered if perhaps that side of it was just rushed (which would be surprising as the stories themselves clearly aren't) or if English wasn't your first language, but a case of mild dyslexia makes much more sense.