This may be just how it works and not a bug, but it's a bit weird.
If you have a piston, hinge... and you make the input 1 but turn it off while it's moving the part will go to the last input it received when it was on instead of just stopping in place.
In the sandbox the hinge will move right when the slider is >0 and left when it's <0 and will turn on only if the slider 2 is not 0. My intention was to change the slider 2 based activator and set it to slider 1, so the hinge would move with pitch until the pitch is set to 0 and be stuck in place, for things like controlling robotic arms with pitch, yaw and roll.
Could this be an option though because sometimes it is useful to have mechanical parts continuing to move after deactivation