# System wouldn't let me choose “not an answer” while reviewing… what is going on??

A while ago, I was rviewing LQP's, and I came across this, or more specifically this answer. My opinion was that it was NAA since it basically restates the question in the form of a hint, as a comment below it says. So I clicked "Recommend Deletion", and… WHAT? Only two comment choices: No comment needed, and This is a link-only answer (and not spam). Plus a sort-of warning. Here is a screenshot:

I opened the answer, and flagged it as NAA. I was tempted to flag for mod attention to ask what was going on here, but then I thought I would just do my review via a flag, and hit Looks OK on the review queue. So my question is: why did this happen? Why were the choices not present? And what should I have done? Did I take an appropriate course of action?