RGBL1896 motor keeps running

Hi I have my RGBL1896 
up and running works perfectly when in the run tab (still using push button for run signal) push the button motor starts and when released stops straight away but when i move into the config tab or disconect the laptop altogether when you release the button the motor keeps running for 8-10 seconds longer why is it doing this, is there a setting i have wrong or a problem with my the script at my wits end with this thing please help  thanks steven