One thing I learned with SMP saddles is that they have a rider's weight a bit further forward (and angled in) on the "sit bones" than most other saddles. I went through developing new sit bone toughness when I switched to SMPs...but it was worth it to no longer have the soft tissue areas. I'd say if what you're experiencing feels like bone pain and not soft-tissue that you're on the right track. Simply easing back into miles/time is probably what you need. BTDT!