There's nothing on the report that you could just point to and say that's what's causing the problem. You have age related and post - operative changes like disc problems, an annual tear and scar tissue, taken as a whole these things can cause a lot of pain. And being on your feet 8 hours a day probably doesn't help matters. Hopefully your Doctor will have some answers for you.
Take Care
Well i have had pain even after the surgery but i blamed it on the recovery process I just thought that it may take months before i would be without pain it started out when i would go to get out of bed had alot of stiffness and weakness when i would try to walk i dont have any pain down the legs it may ache now and then i do have alot of burning type pain i had L4 L5 fused i work in a factory and i am on my feet for 8 hrs so have to take the pain meds every 4 hrs just to get through it some times i will even have to take a pain pill before getting out of bed what makes it better is to bend over and streach or lean on somthing..
You had 2 years after surgery where you felt okay? What levels did you have fused? Is your pain primarily back pain or is it down the leg or both?