Recently, I even wrote "buy" instead of "by"! Crazy times
[0] the intentionally missing word is "true"
[1] the intentionally missing reference ([0]) is after the word "so"
[2] there are no more omissions
It's just something occasionally goes wrong with the thought -> word pipeline buffering in the one case. I find the homophone substitution more interesting - I would never, ever make the mistake writing, or if I was paying attention to what I type (I find it happens even more commonly if I'm not paying attention to the window I'm typing on), at some level it seems that the unconscious word-to-keyboard process 'hears' and transcribes somewhat phonetically in a way totally disconnected from my conscious thought process. I find it fascinating I can 'visualize' the spelling of and think a word like, I don't know, 'bare', but my hands, as if completely independent, type out 'bear.'
Another piece is that, if someone talks to me while I am typing, sometimes words from our conversation creep into the text.
Interestingly, I find these mistakes are more common when I am taking stimulants (caffeine) than when I am not.
[1] This is another common mistake I've noticed. I am quite certain I thought 'reduced', but 'reducing' came out anyway. I think this is usually due to me changing the grammatical structure of the sentence midstream; I probably originally thought "you're reducing" instead of "you've reduced", but I typed faster than the thought completed. Maybe this says something about my intellectual capacity. :)
also, i tend to agree with your conclusion, i think what i described are normal human errors, not necessarily signs of dyslexia.
I think it is an advanced state of distraction that causes it, a brain unable to really care about anything until the next dopamine hit.