Mistakes trip you up in two ways.
First you have to keep correcting and secondly they mess with your head and
you start expecting more mistakes and because of this, you make more mistakes. Grrrrr
Watch this video below and get this problem sorted now.
Oh, and one more thing...
one of the first things you should do if you keep making mistakes is to SLOW DOWN!
Seriously... it's a bit like driving a car.
It takes time to find out where everything is and know how to use it but once you do,
it becomes automatic, just like putting your seat belt on.
So buckle up and get typing :)