Here's an idea... hook up with a skilled fly casting instructor and get a few lessons.
Instead of guessing as to what causes your tailing loops they can instantly assess your cast and show you the remedy. Then when you practice you will be practicing proper form and power application.
There are quite a few certified instructors in Texas. It really would be worth your effort to find one near you. Your learning curve will be quite short and your parctice time far more productive than flailing about endlessly as in fixing one casting issue only to create another.
Find A Certified Instructor