I'm not quite sure what you mean by ?add one more map to my presets.? Are you saying you can't add any more configs?
If my guess is correct, this might be because you've added configs on other consoles, causing the total number of configs to reach the limit. You can connect the ReaSnow S1 to another console, delete the extra configs, or use the firmware upgrade program to restore the ReaSnow S1 to default.