I see what you mean. Both can be used as nouns or の adjectives, though. As Athomasm said, I would recommend notifying the staff about that, though.
But also, keep in mind that, if you want to dwell into the details of every word you learn (which is a great idea, that a lot of people don’t necessarily do), you should use jisho.org instead of Wanikani, as it shows more detail. For example:
Jisho can show more synonyms, meanings that aren’t shown in Wanikani, and also common collocations.
What I do when I learn a word from wanikani is immediately put it into Jisho, and look at the meanings from there. Once I got the meaning, I look at the example sentence and then move on. In my opinion this is the best way to learn.