Smart Stakeout Point ID

I am creating stakeout points using the smart stakeout tool. I have my point id style setup as {#:_C20000,_S1}. This gives me starting number of 20000 and goes up by 1 each point created. However I can not get it to remember the point number that has already been created. It just asks if I will allow duplicate points after selecting a different line. Am I missing a setting somewhere?