I think because of the various stairs in the bow coming from F Deck the Scotland Road spread a lot of water in the ship, I suppose that the water Dorothy Gibson saw flooding the Staircase of E Deck, came from "Scotland Road, I have a theory
that after that, the water went down "E Deck" to "F Deck" to flood the Turkish baths and pool, this can be justified by the fact that this compartment of the ship had no stairs to the G Deck, then after Turkish Baths are flooded, the water rose to the reception Room at about 1:30 or 1:40.
And there were many stairs leading to the D Deck this should have increased the speed with which the water rose. Then the water rose unevenly to the D Deck while still flooding F Deck.
This is one of my theories, know a lot more and could help me improve them, but I was wondering if there are any more reports that proves what I suppose!