The second line of text in the yellow box above the review area is supposed to explain what you're doing in this case, though I can understand if a lot of people skim it in preference of the bright red buttons.
A brief explanation, for those who may be unaware (skip past the bullet points if you're familiar with this):
When you are the person whose post has been edited through an edit suggestion, you have the option of overriding the review process in either case (assuming the post hasn't been edited in the interim).
- If you think that approving the edit was correct, you need do nothing at all.
- If you think that approving the edit was wrong, you reject it - which rolls back the edit to the previous version and subtracts two rep from the person who suggested the edit.
- If you think that rejecting the edit was correct, again, you don't have to do anything.
- If you think that rejecting the edit was wrong, you reject the rejection of the edit, thus reinstating it and granting the person who suggested it the 2 rep for doing so.
So, what we may need to do is change the button to say something that relates more obviously to the review, not the edit, as that's what you're actually rejecting/approving.
Perhaps two buttons (with helpful tooltips):
- accept review (accept the outcome of this review, either approval or rejection)
- override review (override the outcome of this review, either approval or rejection)
We could then reword the yellow box to say something more like:
If you agree with the edit being approved/rejected, click "accept review". If you disagree with the edit being approved/rejected, click "override review".
Having both options also lets the OP specifically weigh-in on the edit in both cases and effectively "closes" the issue.