<p>Suggested edit approval rules were <a href="http://meta.stackexchange.com/q/151536/133693">revised few months ago</a> and now require a majority of 2 votes to be approved/rejected.</p>

<p>The edit on <a href="http://superuser.com/questions/529274/microsoft-word-2007">How to convert PDF to Microsoft Word 2007-format ?</a> was approved by you &amp; needed another approval vote <a href="http://superuser.com/review/suggested-edits/69199">to be vetted &amp; passed through</a>, which I have done now &amp; hence is accepted. </p>

<p>The <a href="http://superuser.com/review/suggested-edits/68940">other suggested edit</a> was already approved by one user and needed a secondary approval vote for it to be accepted, and since yours was the second approval vote, the edit got accepted when you clicked approve.</p>

<p>So yes this is a feature, not a bug.</p>