Even though you are using the SLGS protocol, you need some mid-cycle test data to see how far the blood glucose level drops on the dose of insulin you are currently giving your cat. It's not the pre-shot tests that you base the dose changes on. It's the tests in the middle of the cycle that are used to know when or if the dose needs to be increased or decreased.
Once you have that data, the decision on what to do with the dose becomes easier. Not simple, but easier.
You did a curve back on 2//17/2020 but then you ended up skipping the dose a couple of times, reducing the dose and getting some really low pre-shot tests. (test you do before you give the insulin). With those skipped shots, and the lower dose, the insulin "depot" or storage area has been draining.
So with only the pre-shot tests, there is no way to tell how the current 0.25U dose is affecting Wenchie.
That is why people are suggesting you get some more tests during this PMPS dosing cycle. Like Chris said, the +2 can give you a good idea of what direction the blood glucose level is headed for the rest of the cycle.