Hi Matt,
Just to say that it is not uncommon for medications to be kicking in better after the second dose of the day, or just later in the day, probably something to do with the gap between last dose and morning. Or even just sleep itself.
Catching up on the nightime dip. Also sometimes the slow release forms are not so bioavailable to the brain, less is absorbed. An across the board increase could turn out to be too much, but giving you this for information only, if it is it will show up in some way, you are probably learning that this thing of dosing is trial and error anyway.

Lindy