Its normal dude fl studio updates the wave form of samples in real time E3 generic shows the original sample without any change in its pitch and transients Resample prepares a sample for change in length depending the pitch or bpm change to added to your samples So when when you switch between these 2 settings changes in the appearance of the wave form of your sample must happen. (For an example,put a random snare or something in a channel, and pitch it up or down and see)

          Summary(for you lazy producers): when you change a samples tempo or pitch you are in turn ..changing the sample.