Hey Hoovered one.
I am sorry I know I promised you an email but now I have slacked.
you are out of whack! Ha! Karacking myself up here

(wait that's a pretty good imitation who am I????)
Ok lets go over the stretches because some where you are short (I know you are tall) but some muscles are short and its putting extra pressure somewhere
1. Stretch the hamstrings...leg up on chari bed bend over and stretch those puppies. COuld be these are really tight esp if pulling on the piriformis as the hams shorten up. And chair sitting (office work) is notorious for shrotening the hammies.
3. Quad stretch....do in conjunction with ham stretch its the opposite stretcha and sometimes doing one after the other helps. Try bend leg behind you grab at ankle and pull up towards butt
2. Hip flexor stretch lunge position front leg bent back leg straight lean foward.
4. Psoas stretch - lay on back legs out straight grab one leg behind the knee and pull towards chest. Or lay on back and cross one leg over the other and grab behind the knee of the lower leg and pull towards chest. There is also a stretch for the iliopsoas muscle. I'll try to find.
5. Do some Bridges - lay flat and Lift hips to the air and hold for 3 sec and rollback down. Should help realign the pelvis but dont squeeze the butt too hard it could aggravate the piriformis muscle
Another thing is I have often found that when neck and t-spine feel better the lower back is the worst and locked up. It all connected and when one area is loosened up the other area tightens to maintain posture.
6. So based on the above your lats are one of the longest muscles in your back and maybe because you loosened the upper lats the lower lats (connect to lower back) have tightened up to hold you upright.
Try to concentrate on your core and how you are holding your pelvis. Is it jutting back and you are arching back? If so try to bring it back to a netral position.
PT guys needs to work the muscle groups in opposites. If they only work one half of the equation they other half will tighten up.
They could also maybe try some ultrasound on your lower back to help.
Ok these are just my first thoughts I will send you some more stuff in a PM.
