Looking at the SS I'd say it's probably the reduced dose, but I would actually stick with the same dose tonight to see if you get an evening out of the PSs and a better PS in the morning. Even if you got say two pink PS rather than a red and a yellow it seems like that will make it easier to judge the dose, and then if you raise it back up you can evaluate it more clearly.
It's like he's in this wacky pattern with the different AM & PM PSs, and it would be really nice if you can see that change. It is just making the picture so confusing to evaluate the doses. There are some cats who have to have a different AM and PM dose, but I don't know how to figure out what dose to give at each time, his #s are just so confusing.
So I'd be tempted to stay with 1.25 for another day and see where you are at that point. If he is having some rebound or something like that, then the #s should come down some on their own in the next cycle or two. If not and they stay higher, then this dose is probably too low. But I think it's too soon to decide that for sure.