<p>Hi. I wanted to know more about the settings on your camera. Are you using "AI Focus" mode?<br>
Also to confirm, are you us the back focus configuration in the camera. If so you can reverse the buttons to the * button.<br /> This might be a good work around.</p>
<p>http://www.learn.usa.canon.com/resources/articles/2011/backbutton_af_article.shtml</p>