> **Possible Duplicate:**  
> [Why does flag marking as helpful/declined not always correlate with moderator action?](http://meta.stackoverflow.com/questions/105391/why-does-flag-marking-as-helpful-declined-not-always-correlate-with-moderator-ac)  

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[An answer](http://stackoverflow.com/questions/8340181/sequence-diagram-generation/8340219#8340219) I flagged today as being of a "very low quality" was deemed to be "helpful":

![enter image description here][1]

yet it was not removed. Note that I don't mind it still being there (the question is closed, so it might even get deleted with the question in due time), but I thought that "helpful" flags always caused the answer to be deleted. Am I wrong, or did something go wrong in this case?

I scrolled through ~10 of my "very low quality" flags that were "helpful", and all of them were removed by a mod.

  [1]: http://i.stack.imgur.com/Pb5E8.png