The mind thinks ahead and I sometimes start typing a latter word before the former, or before the former is done. I have sometimes typed "wanto", but I think for this reason. I have also found myself having capitalised a word when it was the next that was supposed to be.
Another mistake that I sometimes do is that is that my mind comes up with two phrases and the result becomes a jumble of the two.
I have not found myself mistaking different English words by sound — because it is not my native language.
But I do think that native Swedish speakers do similar mistakes when typing or writing Swedish, although I have not found myself doing them.
I was taught English not by sounds but from written textbooks, which means that I always picture English words in how they are spelled. (In a few instances I have not learned the correct pronunciation of an English word until a decade or two after I first read it)