I just ran your grains and DME through ProMash and I get 1.065 for a 5 gallon batch at 75% efficiency. How did you figure the predicted gravity?
I always figure gravity after correction to 60 degrees F or what ever the hydrometer is calibrated to. 1.010 is the adjusted gravity that you don't want to go below while sparging. Just guessing I would say you are at about 65 percent efficiency.
It sounds to me like you did pretty good for your first PM.