The link to your last post here, included for continuity,
http://www.felinediabetes.com/FDMB/threads/contradictory-advice-from-our-vet.201110/
I'd guess Ninja saw blue today and is now bouncing, anytime the +2 is quite a bit lower than the preshot, it can be an indicator of anmore active cycle, if you see that when you have to be away, make sure you leave lots of food out for him to keep himself safe.
I don't think the insulin is bad. He likely needs a higher dose, but let's see what the data shows at the end of the week.