Are you running a idle control valve?
Assuming that you have , then you would use that to assist the engine with coldstarting and such allowing the throttle to remain closed
as much as possible and let the idle contrl valve handle air flow into the engine. Then the idle advance and retard numbers would probably be very low - sub 5, and the rate slow as well 5-10deg/256rpm. This should provide you with rock steady idle rpm.
If you do not, the your using the throttle slightly more open when the engine is cold to maintain cold start idle and such, when the engine gets warmer that throttle opening will lead to to high of an idle, so the trick would be to allow for up to 15deg retard/advance and 20deg/256rpm change rate. This will not be as smooth as running a icv, but if adjusted right you can have very steady idle either way.
Another note is that you should be seing high avdvance numbers when cold and very low when hot. Remember these will effect you NOx and CO readings.