Sorry,your SS is set up a bit different I just now saw the tests for amps but the spaces for pmps are empty. You have tests in the space for +11 but nothing in pmps.
YES ! It is overwhelming ! I understand

THe more you read the more you'll understand about what to feed & how the insulin works.
Please believe me when I tell you The people here have MORE knowledge than most vets about Cats with Diabetes. They donate their time & experience to help other people going thru this.
Have you clicked on other peoples' SS (spreadsheets)? You can see how often they test their cats & when. I don't see any tests during the night?
Kyee is getting low Readings on 1 unit of insulin. It's good you didn't give her more & skipped the shot. If you could stop the dry food her BG might come down on it's own. I just checked the Purina DM cat food & it's
18% carbs That's considered High carbs.
A lot of us feed Low carb canned Fancy Feast 6%-10% carbs.
What kind of infection did she have?The infection could have raised her glucose in the beginning & stress can raise it also (like from going to the vet )
I wish you the best of luck. Everyone here justs wants to help you do what's best