It's possible she went lower overnight and is bouncing today. Many cats go lower at night, so getting some random night time tests are usually pretty informative.
Continuing on your conversation from yesterday, many people recommend Friskies or Fancy Feast because they are economical low carb food and you can get them most anywhere. However, they are not a good products for cats with kidney issues and not everyone realizes that when they suggest FF or Friskies. There are lots of other food options available that are low carb and lower phosphorus. I never fed Fancy Feast or Friskies.