I would not hold the dose longer. If you increase on 1/26 you can get more tests over the weekend to see how he is doing on a dose.
What you want to do, whenever you can manage it, is to get "spot checks" i.e a before bed test at night or the random test in the day when you're home etc. That will also give you info on how he is doing on a dose. The downside of a weekly curve is that if he is bouncing on that day, it won't give you an accurate picture of how low he has gone on the dose. He could have dropped lower the previous day and be bouncing from there.
My Bandit is such a scaredy cat, she is a large mouse! We keep joking that we should have named her Bandicoot and not Bandit!