This question already has an answer here:
When reviewing, it is possible to edit the post that is presented. However, when what you are reviewing is actually a review audit and you click edit, the following message appears:
This post is deleted and cannot be edited.
See this example
Doesn't this kind of give the game away? It's literally telling you that you need to flag the post as it's an audit. When you do so you'll get the Congratulations message, giving you a free review point.
Is this a problem? Should this be Changed?