Hello TwigNZ,
I noticed that your question was getting lonely so I decided to experiment a bit. What can I say, but every time I am forced to mess around with a tool, I learn more and more about it and PGC.
I put a check mark in the Hide: Archived and Disabled fields. I ran it for both the North and the South islands separately, then, toggled the multi-function to run it with both the islands together. It did eliminate that pesky test cache.
To eliminate the oldest cache from displaying, I tried to use the filters by using a date range but that did not work since it kept defaulting to the next oldest cache. Adding a filter to toggle the oldest on or off would be a good idea.
It does make sense to add the Chatham and Stewart Islands as choices in the regional listings. Once someone hides a cache there, then, you can actually choose to exclude by not including them when you pick regions using the multi function.