Think of it as "how low can this dose take my cat?". He saw greens the PM of the 30th. If you are seeing green numbers you are looking at the 3rd sub bullet point of the first point - hold the dose for 10 days. We want to see if he'll come back to green on this dose after the bounce is over. He should tell you that either tonight or tomorrow during the day.
Yesderday's day cycle is technically the 10th cycle of this dose and with the lowest point being 88, he does have room for an increase. But you want to avoid increasing the same cycle a the bounce breaks, so waiting a cycle or two won't hurt.