Ideas:

The irregular pattern in P does not seem right, (Cfr Hb9-39 with Pb10-39).

Perhaps we should count only when the number changes:

That way we arrive at the sum 25, i.e. the same sum as in H. And 25 = (5 + 7) + (6 + 4 + 3) = 12 + 13. Better, but not good enough! I think it should be like this:

Here we can see that Sunday and Wednesday are special, which my intuition likes.