yeah i noticed that, i am using modfactor and timefactor and i think only the timefactor has a spill setting but it doesn't seem to work, at least not the way you described which is what i was expecting, you have spill on, turn off your delay and your repeats still finish
also i think you should be able to turn it on while playing and have it just take one riff and delay it like curtis mayfield does on his vocals, or eddie hazel