Same problem here. And I've uninstalled and reinstalled the module just to be sure. I'm only working with 2 zones (Canada, USA)
USA
17:15,10000:0
Canada
39:9,10000:0
Essentially a minimum order amount for free shipping, but the minimum varies depending on if you're from the US or Canada. I can get it to work with the default "table method" shipping, but that's only good for one zone.