They will need to apply for a Variation of Travel Conditions at the same time you do, if they want to come to NZ after their travel conditions run out. It is your actions that determine what they are eligible for.
https://www.immigration.govt.nz/opsmanual/43653.htm
The same thing is true for PR - when you qualify, you are doing it on behalf of all the people who were on your original application, as long as they activated their visa by entering NZ (which you have told us they did).
https://www.immigration.govt.nz/new-...anent-resident