I don't feel like this needs any explanation:
:) It looks like you need to report a bug - click on the help link at the bottom of this page, scroll to the bottom of the page, and click on the link labelled report a bug.
i don't know any Spanish, but it's probably that it doesn't detect that you spelt 'nueve' slightly wrong. Are you sure you done it in the right form? For example; Masculine, Feminine, and Plural. (My mistake if I am wrong :D)