I spotted a spammy looking answer (10k-only by now) and when I went to flag it, the flag dialog told me that I'd already flagged it as VLQ:
The thing is, I'd never seen this post before. And a look at the flag history in my user profile confirms that I haven't flagged a post since yesterday:
Certainly, well before the 2015-02-04 05:36:21Z time of Mr. Miracle's post.
I was able to reproduce this on SO from the VLQ review queue: when you're presented with an answer, click on link
at the right side of the page, then click flag
. You get the "you have already raised this type of flag" message on either the "it is not an answer" or "it is very low quality" options, I gather depending on the original flag that pushed the post into the VLQ queue.