Speaking In Plural
The tests where the woman says a phrase and you type it out are, as far as I can tell, rather dicey. It seems impossible to know that she's speaking in the plural when the words sound the same as their singular counterparts and you're expected to type the word out correctly.
I'm surprised that these consistently confusing issues have still not been addressed. By ignoring them, all that happens is that they get reported again and again, drowning out detection of other issues, and deterring people from continuing.