Reading your own writing

I do that all the time, probably because I don't type properly. I also almost always type present participles wrong, ending in "ign" rather than "ing"

And then there's hitting the semi-colon instead of the apostrophe. "don;t"

For this reason I always read anything I write loads of times, and I revise it extensively to make sure that I'm happy with it. Sometimes when there's a long delay I'll go back to a piece and find myself revising back the things I had earlier changed.