I have noticed a number of inconsistencies while using the Dutch program. In some instances what was once correct, or tolerated, will not be in another. At times I have typed "trinkt" instead of "drinkt" and it would be tolerated. At other times, it will not be. Same with "broodjes" and "boterham."
It was rather frustrating. A typo is just a missed key or letter. Earlier tonight, I was doing a practice. I was almost finished when I missed a question. Then another. And another until eventually, all my progress was wiped out. Dutch is the only language that happens on.
It would be nice if the Dutch program was built more like the German/French/Spanish programs.
Sometimes you are lucky and you get away with a typo. However, they are still mistakes, consciously or not. I know it can be frustrating, though using the correct spelling is part of learning a language. I don't know what your issue was with "broodjes" and "boterham" though a common mistake is using the wrong article.
Regarding losing "progress" when you get a question wrong, that's how it is programmed and that is not something course moderators can change.