Botox help! Had furrows treated but 8 days later only having effects in middle of forehead. (photos)

I was injected on July 1st to treat my 11's. I felt effects after 5 days in raising my brows. My forehead across the middle is heavy. But I am not feeling any difference at day 8 in the furrows. I can still fully scowl. I know it can take up to 14 but is the middle of the forehead typically affected when only doing the furrows? And is it possible that in the next 5 days I could potentially see a difference in relaxing the furrows? Photos are of me scowling and trying to raise my brows at day 8.