I'm not the best at explaining, but will give it a shot. Your heat is not from the seed, the seed left behind has capsicum on it, because the blister/placenta has been pierced. Hence all peppers have a blisters where the capsicum is stored. So in the cleaning process, all the blisters are being opened up and releasing the heat. For a test, take a small bite off the very tip of the pepper, there will be little to know heat. Take a larger bite and you will be sweating below your eyes... Grab the milk and soda crackers!!! I can't find a decent picture on the inter-web to show the blisters, but once had a book with a magnified example. Think of a water blister burn we all have had and multiply that by thousands, that is what is on the inside of the pepper.
604, thanks for the shot of the Sleeman's Cream Ale... Jealous we don't have that here.