of course they wouldnt have asked for a rematch if they had won.... because the only reason they have to complain is that it affected a possible win and if it didnt theres no reason to complain

as for who was at fault, that is hard to decide from the perspective of a bystander... only that ref and that human player/drive team know what happened

even if it was the human player who stood on the mat, if they were told to do so by the ref and it is not in the rules that they must, then that still makes things unfair..... the human player may have listened out of fear of disqualification when it was not something they wanted to do