If it is not blended well, it can cause excess layering. That is why it is important to add the coconut milk first. Then the soft ingredients like the pumpkin puree, yogurt, and almond butter. The other reason this may happen is if it sits too long. Make sure the ingredients stay in the refrigerator and freezer until you are ready to begin. Gelling is another issue. If flax, chia, or blueberries are added, they can cause a jelly-like substance because of the pectin. This can be remedied by stirring.