Gita:
I agree with Elise with regard to how you're taking reductions. I'd like to step back for a minute with a few thoughts.
It looks like you're still following TR. If so, one point to consider is that Wally is a long term diabetic. Reductions occur at a lower number than with a cat that's within a year of diagnosis. On a human meter, the dose reduction point drops from 50 to 40. I'm honestly not sure what that would be in AlphaTrack terms but you need to consider that the point where you reduce the dose is now lower than previously. I would encourage you to go over TR and evaluate the dose every 6 cycles.
I think Wally is bouncing. Any time you see blue or green numbers, he then spikes into the 400s or higher. The trick here is to try to get as much insulin into Wally as you safely can while at the same time, try to prevent a dose reduction by steering the numbers with food. Ideally, he will start to spend more and more time in lower numbers and his pancreas will stop panicking. For example, on 1/27 during the PM cycle, when you saw the drop from PMPS of 372 to a +2 at 155, it was loud signal that numbers were heading rapidly down. It would have been a good time to test and intervene at +3 (ore even +2.5) so numbers didn't have a chance to drop into the 40s. Instead, you'd want to keep his numbers in the higher greens/lower blues.
There is an inherent problem with holding on to a dose that isn't getting your cat into more desirable numbers. Holding the dose can result in glucose toxicity developing. It's a horrible term for basically saying that your cat's body starts to treat higher numbers like the new "normal."
Another option is to consider holding the dose until Wally drops below 68 (since you're using an AT meter) during 3 separate cycles. This is a variation on TR that can be helpful for longer term, bouncy kitties.