Matey, don't worry about the Rank displayed it means fuck all. MMR is what determines who you are matched with/against and how much lp you gain/lose per game.
So, don't worry about rank at all. All you need to do is have a good winrate and you will climb.
P.S. If you was silver last season, it's only natural to be placed to bronze so you have a "sense of accomplishment" when you get back to silver, at least according to riot that's why. If from silver you were placed to silver then it's like season never changed. Placements are not meant to make you advance rank. Even with 10-0 placements on a fresh account (without your past silver MMR) you won't end up in gold 1-plat 4 like in the older seasons.