Well, yes- I definitely agree that the mistake should be pointed out, so that we know that it is a mistake, but the entire answer should not be counted wrong. On other exercises (in both the Norwegian course and in the other courses), when there is a small mistake (e.g. an unnecessary space, a wrongly-placed punctuation mark, a missing diacritic, one wrong letter, etc.), then the program usually accepts the answer, but simply says "Almost correct" and specifies what the mistake was. That is all I am suggesting here.