[e12e]

I'm not sure why this software behaves that way -- but it used to be a (mis)feature of measuring typing speed on mechanical typewriters -- there were no do-overs. The only way to correct would be to either go back and strike-through -- or manually correct, whiting out the error, and typing the correct word. The first wasn't really usable for "typed" letters and such -- and either would take much more time than on a word processor. Because of this, when measuring wpm/typing speed, errors are severely punished -- even if many of those can be taken care of with auto-correct and/or much faster manual correction.

I'm not sure sticking to this measure for typing speed now that hardly anyone uses typewriters -- but errors do break flow, and for that reason it is good to train towards perfect typing -- even if that means typing a little "slower".