hcaroselli

Hello - first post. I have an X100s and am trying to learn how to use shutter speeds less than 1/4 second that appear on the shutter speed dial. The manual says to set the shutter speed dial to T and use the command dial to cycle through slower speeds. When I do this the shutter speed on the rear display reads 5" which I assume means 5 seconds. When I cycle the command dial the shutter speed does not change but the f/stop moves from f/14 through f/9.0. What have I done wrong? Thanks Hector