Mig,
Perhaps somewhere along the way things became a bit distorted. The PT, in my case, never diagnosed a thing. The first doctor (an orthopedic doctor) I consulted with at University of Michigan Spine Center pronounced my "injury" as a lumbar sprain. He's the individual that directed me to PT as a means to help me overcome this "injury".
I agree that no amount of realigning my SI joints was going to do the trick. I had enough of PT and sucked it up for awhile. I then found a new doctor (orthopedic again) at a smaller, less "prestigious" nearby hospital that did the x-rays, blood work, and clinical evaluation.
I guess my point in my post that mentions a "floating" pelvic area is the following. A qualified medical doctor (not a PT) that believes that perpetually unstable SI joints can be dismissed in suspecting/considering AS as the diagnosis, may want to rethink that belief. While it may not be a documented diagnostic criteria, it should not be completely ignored in attempting to diagnose the patient.
I hope this clarifies what I was attempting to communicate a few posts ago. I'm sure it's clear as mud now.
