The lead charge needed to be changed to poisoning with intent to cause inconvenience with a noxious substance instead of cultivating cannabis, the judge said.
"Given that there are nine victims, that should be the lead charge."
The adjournment of sentencing would allow both the prosecution and the defence to make submissions accordingly.
The unusual nature of the case also begged the question of whether or not there were mental health issues that needed to be addressed, Judge Singh said.
It was up to the defence if Jones wanted to pursue restorative justice, he said.
"I understand at least six of them were not willing to participate", he said.
But three of the victims had not said so directly as of yet.
Jones remains on bail until the new sentencing date of July 24.
He had been charged with nine counts of poisoning, cultivating cannabis, possession of utensils and unlawful possession of firearms after police searched his house.
He was scheduled to be sentenced today after he pleaded guilty to one representative charge for the poisoning and guilty to the other charges in the North Shore District Court in February.