Hi Letitia,
I still think you're getting confused between WP's and Permanent Residence applications.

My friend got a job as a practice manager. She applied for a 2 year work permit (and got it). She is now (1.5 years later) in the beginning stages of applying for her Permanent Residence based on that job (also considered skilled, though not long term or essential skills shortage). She has also studied a diploma here that will push up her points.
Perhaps your best option is to email/phone NZIS to ask for advice on which to do first. If you're in the country already, just pop in to their office - they're usually pretty friendly and will advise the right way forward. Alternatively, arrange a consultation with an immigration lawyer (there's a good one in Botony)