The pinks and yellows you are seeing now seem to be a bounce triggered by that 98 just 3 cycles ago.
The depot of the 2.75u was probably in play when you got that 98.
If he hadn't gotten down to that 98, I would say yes take him back up if you don't see green by end of today, but I'm a bit hesitant to recommend that with that 98 there just 3 cycles ago, I might wait a couple more cycles to see what he did when the bounce cleared, before calling a failed reduction.
I do agree with Karen, fattening/skinnying the dose is usually used when you are honing in to a good dose, I don't think Zeke is there yet. When you do take him up, if it were me I'd probably go back up to 2.75u, I know he got down to 33, but I looked back at the condo for that day and one thing that stood out was that you waited for him to drop below 50 before steering with food.
Given that on that day he dropped to 69 @+2 from an amps of 122 that was a sign that he meant business for that cycle.
From the new to the group sticky:
Example of an ACTIVE, but NOT necessarily typical Lantus cycle:
NOTE: Until kitty is pretty well regulated, the description below is NOT not what you'd consider a "typical" Lantus cycle. It takes time and patience for kitty to achieve a "typical" cycle! The example below is what you're working towards (a nice shallow curve). A relatively flat cycle is the ultimate goal.
+0 - PreShot number.
+1 - Usually higher than PreShot number because of the last shot wearing off. May see a food spike in this number.
+2 - Often similar to the PreShot number. Onset begins around +2 for most cats. You'll probably see an active cycle if the +2 is the same/similar OR lower than the preshot number. Continue testing!
+3 - Often lower than the PreShot number.
+4 - Lower.
+5 - Lower.
+6 - Nadir/Peak (the lowest number of cycle. NOTE: ECID. Not every cat has a mid-cycle nadir. Adjust the hours on this example to fit your cat.)
+7 - Surf (hang around the nadir number).
+8 - Slight rise.
+9 - Slight rise.
+10 - Rising.
+11 - Rising (one of the quirks of Lantus/Levemir: some cat's blood glucose numbers dip around +10 or +11... not to be confused with nadir).
+12 - PreShot number.
Feeding some LC/ or MC at that point might well have helped him surf along in greens and not drop quite as hard as he did, or maybe you'll find that he needs MC or more, keeping notes on your ss and experimenting with the fuds can help you manage the curve with food, the goal being to get him to spend more time in greens, this with a little luck and a fair wind may help mitigate his bounces, it certainly made a difference for George, once I got the hang of managing his BG he flattened out.
Managing the curve with food can help flatten the curve, and allow kitty to see more green. When I adopted this approach I changed Georges feeding schedule, from 4 meals a day to 8 a day, I split his food so he got 1/4 of his allotted food for the day at amps and 1/4 at PMPS then he got 1/12 at +2; 1/12 at +4; and 1/12 at +6 (in am and pm cycle), I used that as a starting point, then as I gathered data and learned his cycles, I let the numbers guide me.
Here are a couple of post that talk about managing the curve with food and bouncing, I found them very useful when we were starting out.
Scroll down to post 13 and the discussion on managing the curve with food starts there
Tashie managing curve with food
http://www.felinediabetes.com/FDMB/threads/8-10-tashie-pmps-high-questions.101989/
Jetta and bouncing
http://www.felinediabetes.com/FDMB/viewtopic.php?f=9&t=55306