Your awning is mounted as designed. It is supposed to be higher. That valley is on all roll up awnings. If you do not want to store it that way, you can remove the bottom stop washer/screw and stops on the outer arms. You can then roll the awning out 6 inches, drop the outer arm down a few inches and then retract. This will cause the awning to NOT roll up tight but will allow you to have that slope. Just remember to reinstall the side arm stop bolt/washer in the spring and put the awning back to correct install. A lot of work for something that is not really needed. Doug