Do all people with cortical dysplasia have seizures and other problems I never had seizures and vision is 20\20 condition found due to 24\7 headaches

No, not all. Not all people with cortical dysplasia have seizures. This finding is typically made when a person has seizures, it does not cause symptoms many other times. Cortical dysplasia tends not to affect vision or be related to headaches, for example. Sometimes cortical dysplasia is found on brain MRI, but it may have no clinical significance.