Well apparently the scale is still off a little bit. She is responding stronger to a dose the past few days than she has in the past.
Since tonight is setting up just like last night, your PMPS will probably be a high pink again, since the 1.5u was too much last night you should lower the dose for tonight. I would go with 1 unit or 1.25u, so she will have a shootable AMPS.
While it is confusing and frustrating, believe me that these are good problems to be having.