Hi Wasyoungonce,
I'm glad that you like the new features
Thank you for the helping info you had given!
The dithering the commands 1-5 define the aggressiveness of the move, then in PHD there is algorithm to make the move random. The commands are hard-coded in PHD and other values are ignored. There is no explicit documentation about this, so the best description is found in the Nebulosity doc:
In the dialog, tell it how much “dither” to send. The dither sent will be a random number of pixels in X and Y, scaled by the level you pull down here. In the lowest level, the random numbers will vary from -0.5 to 0.5 pixels and in the highest they will vary from -1.5 to 1.5 pixels in the guide frame. Since people typically guide at shorter focal lengths than they image at, this will usually have a much larger effect in your main images.
So the max possible distance is up to 3 pixels... There is nothing stupid in the question!