Yeah, that’s what I meant, sorry. Pg 18 and 20-21 of the manual. And you’re correct – it’s in addition to UNISON (RESET, ROTATE, REASSIGN or UNISON).
I imagine that if you’re doing >4 notes that note priority is given to whatever track you start on. Eg. If you’re on track 1, then that will be given priority over track 4 etc. Pg 20-21 illustrates the voice stealing. Not sure if this is what’s happening though – probably not now that i’ve re-read the manual and OPs original question…