When using pitch + multimode all faders will affect the pitch of the pad you are hitting regardless which pad you hit or fader you move. However, the pitch setting for the pad you hit does not actually change unless you move the correct fader for that channel.
Example: Hit pad A1 while moving the fader for channel 2 and you will hear the pitch of the sample being played by pad A1 change accordingly. However, as soon as you stop moving the fader for Ch2 the sample on pad A1 returns to it’s original pitch.
So, ain’t no thang.