OK. Do you have a link to some documentation on how to line up the court and exactly what keys to use? I assume that you mean the 3 key is the one on the numeric keypad, or maybe it is the one above the letters, or maybe it does not matter. Either way, it does not work (for me). Are you saying that it should not matter whether or not I am in warm-up or match in Devmode (that the changes should be saved either way)?
What I do is this: in Devmode, I go into warm-up or match and then I use button 7 to move the court just a bit more toward Player 1's end. Then, I press 9 (many times). Next, I press Esc. I exit the game (by Leave the court, Give up, whatever, but not the cross or Alt-F4). I go back to the court, and, at least if I had been in Warm-up, the change that I made is lost. Am I doing something wrong? Pressing button 3 does not and never has for me loaded any changes that I have made; it always moves the court so that it is up in the air, and it is the same movement every time that I use the numeric-pad button 3. Is anyone else having this issue?