This is still quite a widespread problem. INZ changed the name of the first 'forever' visa in November 2010, from PR to Residence. Even some government departments, as well as businesses and institutions, haven't yet caught up with this and changed their paperwork and websites. Therefore, it's worth looking at the date on any information you're reading that says 'PR', and also, as you say yourself, a phone call to them could give you good news. With a Residence visa, you HAVE got the right to stay in NZ permanently.