I flagged this answer as not an answer because it doesn't address the question asked. My flag was disputed. A lengthy discussion in the comments has ensued, but the answer is clearly off-topic and should be converted into a comment.
My main concern is that the answer has collected a few upvotes (and my downvote), which puts it near the threshold for a question to be automatically considered answered by the system, even though it is very much not answered. (The other answer might be the solution, but I don't know yet.) I'd hate to see the system gamed, and I don't understand why my original flag would have been disputed in the first place.
What is the proper action to take in this case? Should I re-flag the answer with my rationale? Is this meta post the proper way?