Running the ball can be easy and you probably was getting use to how the gameplay was at 0 but it would have been best to get a bigger sample size just to make sure it wasn't just the Saints D. You can't be too upset with D.Brees lighting you. I would have seen your point if that had of been Geno or some other low rated QB lighting you up but you still need to play more(full) games.. That is the only way we'll find out the issues.
When I had the punts higher the CPU was booming 80 punts like it was nothing so I had to nk choice but to lower it down since we share the same special teams as the CPU in CFM. You just have to try and get the kicking meter as high as you can when you punt. If it continues to be an issue for you raise the punt power up to 40 or 45.