teb, don't struggle back through records for those lumbar numbers. I wondered because often there is a slight loss of bone mineral density with both Tymlos and Forteo. I suspect the loss occurs with canalization, a function of the osteocytes which doesn't reflect a loss of strength, but a loss of mineral density.
But you are doing well in maintaining the density gained. I feel encourage to try heavier weights.
Orange County, then. Good endocrinologist?