with the numbers, once you add a local country you can't remove it from the SIM. Thus if you added all the 9 your allowed and wanted to say add a 10th, it won't allow you. I found out the other day when I wanted to add it. Doesn't matter if the others are active or not.
I contacted Toggle and they said that when I add a country, that information is written on the SIM and can't be undone. They did offer to mail me a new SIM though. But I don't think many will need all 13 countries