Children with dyslexia who have been taught phonics can often learn to say the individual sounds but not blend them together.
Missing out words or skipping lines as they read.
I'm not an anything I make other errors in English when speaking other languages, while tired, under stress or time pressure, after reading a long time in that other language. Please improve it by verifying the claims made and adding inline citations. They may have a hard time holding a pencil properly or remembering how to write a word.
I usually confuse their and there, and sometimes misspell myself as myslef. It's reassuring to know that that otherwise "healthy" people get this too.