I went ahead and called them today. I'm going to send a sample off early this coming week to the A&M Research Center. After hours and hours or research and watching and looking at the grass closely, and also speaking with a local lawn person, I have a strong, strong, gut feeling telling me that it's Powdery Mildew. After looking on several websites, resources, and Google Images I see exact identical properties when compared to the images in Google. Also, being under the oak, the humid temperatures, high grass, and also the new privacy fence around the front, seems like it could restrict airflow and oxygen. Along with the humid and hot temperatures and water, I have a Gut feeling also telling me this is my issue.