Sounds like you've had a pretty bad injury. I t doesnt sound like you are experiencing any instability, so, I am not sure that the ACL is the problem. You already had arthroscopic surgery, and you related that your surgeon "shaved " part of your ACL, so I dont think there are any loose fibers causing your symptoms. You did describe a patella dislocation that occured along with your ACL tear; and in fact, the symptoms you experiencing sound as if they are more related to that problem. At this point, i dont think surgery is the answer, I would recommend further PT, for strengthening, endurance, and Range of motion. Good Luck!
Thank you so much for your prompt reply Dr. Michael Gross. It is just an assurance I needed.
Now I must concentrate on my PT.
Have a great 2011!