Yes but did he actually evaluate (and treat) your Lumbar spine? Problems in the SI joint and torsions of the sacrum are often accompanied by Lumbar problems (particularly L5/S1 issues if the sacrum is not moving as it should).
I would have stopped seeing him as well.
Just pushing into the lower back does not a lumbar eval make. A full evaluation might include range of motion testing in multiple planes, repetitive motion testing, segmental joint mobility testing, an assessment of alignment (along with sacral and pelvic alignment and dynamic tests), soft tissue assessment, muscle strength, reflex and sensation testing etc. The fact that neural tension stretches helped to reduce your calf pain is further suggestive of a possible nerve impingement in the lumbar spine. From all that you've said in previous posts it just doesn't sound like your lumbar spine has been adequately addressed.