It's always good to post a link when you are asking about a specific pattern because it helps others help you. Is this it?
http://www.knittinghelp.com/knitting...dk-hot-pad.php
I'm not sure why the chart only has 29 vs the 30 CO. It seems like 29 would be the correct number since you want the heart centered, but I haven't made it so I'm not sure. Since the entire project is on the CD I think it would help clear up any any question you may have.