You’ve been doing a good job of staying on top of it tonight. HC usually wears off in two hours so by +5, it should be out of his system.
Feeding: many feed minimeals so, no, he does not need to eat all of his food at shot time. You can let him graze. It’s actually better that way as it works with the insulin; as the insulin onsets and numbers drop, the carbs in the food can help flatten the numbers a bit. His feeding might need some tweaking where you might want to leave portions of food at different times in his feeder. That way as numbers come down, they don’t just drop fast and trigger another bounce (which is what it looks like is occasionally happening now). Spreading the meals out a bit helps those drops.
BTW, I don’t know if you saw
my post but we do new SS tabs each calendar year. PM me if you need help with it.