Hi LaurieJ,
Welcome to the boards. I've gotten a lot of great advice here and hope you will, too. The situation you describe happens in my house as well. If DS goes down early for a nap (usually the AM nap, too) and therefore wakes up before it's time to eat, I usually give him light A time until it's time to eat (mostly rolling around in the crib). I've found that this helps my DS take a full feeding. If I feed too early, he won't take a full feeding.
Also, I don't usually try to lengthen the total A time, it makes my DS overtired. I just follow his cues and on these days end up with EASAEAS.
Hope that helps! I'm sure lots of other Mom's will weigh in on what they do in this situation, too!
Good Luck!