I honestly think you need to give this more time. There's a switch back and forth from BID to TID to BID dosing. The switch back to BID has been less than one month. At maximum, Callie was getting 2.75u total on TID and now, you're just up to 2.5u total on BID dosing.
It's likely that the numbers aren't stable because you had been giving 1.25u in the AM and 1.0u at PMPS for several days. I realize you may not have been comfortable shooting a lower number some evenings, but it would provide at least one explanation for why the numbers aren't where you want them. In some instances, I'm not sure why you reduced the dose. (Are you following SLGS or TR?)
I wouldn't be concerned about raising Callie's dose. Sometimes what may be a good dose one week is no longer doing the job. If you're following Tight Regulation, you want to evaluate the dose every 3 days/6 cycles and increase the dose if you need to.