Suzanne -
What I'm seeing is an early nadir. It may be that what I'm seeing is influenced by how you're already feeding, though. Gabby was an early nadir kitty. Looking at her spreadsheet may be informative for you. Basically, what I did was to front load her cycle with food. I fed at shot time, +1, +2, and in the beginning at +3. Eventually, the +3 was eliminated since I couldn't be home that long on work days.
What are you feeding LT? If you are using a very low carb food, you may need to use something that's a bit higher in carbs and see how that works.
One other thing to consider is that any change in food or how you're timing the meals doesn't necessarily have an immediate response. It took several weeks for Gabby's system to accommodate the change.
Thanks for clarifying that for meI split up the AM meal into portions (3 or 4) that I then fed at AMPS, +1, +2, and +3 (if I was feeding in 4 installments). I did the same thing at PMPS.
If you were to increase the carbs, I'd try the 6 - 8% range first. Some cats actually do better on a bit more carbs. I would not suggest changing the frequency of meals AND changing the carbs at the same time. If you do both at the same time, you won't know what is or isn't working. If you make sequential changes, you'll be better able to know what is or isn't working.
Just keep in mind, adjustments to food and carbs are truly ECID. It's a matter of trial and error and attempting to figure out what works for your cat. And of course, cats do not like to be predictable and LT will, no doubt, throw a monkey wrench into the mix.