Correct Zaphod. I understand the point that Iceman is trying to make, it's the spin he puts on it that annoys me.
Yes, it might be cheaper to book two separate fares but to say that there is no risk of missing the Samoa flight is wrong. Anything can happen, and does happen. I fly multiple sectors about 50 times a year (Auckland-Invercargill, Auckland-Hobart etc) and about 2% of the time I've been rescheduled and 1% of the time I've been put up overnight and rescheduled. No cost to me and I've been well looked after. On international flights I've been put up overnight in Melbourne and Sydney and once transferred to Qantas to get me home same day.
You can mitigate your risk by leaving 24 hours+ between flights but in Iceman's case that means spending a day and night in Auckland - so add accommodation plus the damage to your Credit Card spending all day browsing the shops at Sylvia Park (just kidding!). Seriously though if you take out travel insurance, read the fine print as you may find they insist on 24 hours or more between unconnected flights.