Shampoo B is the mildest shampoo that you can find. So it will be very gentle on your scalp and help it heal and regrow new hair BUT it will also remove less of the oil. This is probably why your hair gets oily faster. We would suggest that you try the recipe of shampoo A that contains a surfactant that is slightly stronger and would help you clean your scalp enough. With shampoo A you can tweak the amount of oil in the recipe if it still feels a bit too oily for you. Also make sure that you add a reset shampoo in your routine every 2-4 weeks to make sure to avoid long-term buildup on your scalp :)