I was given the options "Aloha!" "E!" and "Aloha pono!" The first was given as the correct answer. The translation listed here makes sense to me (Aloha kākou). I think this is a mistake. For another question, I was just given "Hello" and the options included "Aloha kākou." It almost seems like the answers for these questions got switched.
Keep in mind, this course was just released in beta. We are being given the opportunity to start learning sooner, in exchange for dealing with these kinds of issues, and reporting them so they can be fixed. In the mean time, we can come to the forum here to check our sanity