I named prefixes green, orange, blue, etc. I was baffled how they disappeared from the custom box but the style still showed on the forum. Then I realized when I entered "label label--green" it actually was marking the green radio after it saved. This also explains why in other parts of the acp the green was the old green and not the custom. IMO this is a bug and it should be saved, or perhaps it should produce an error to let us know to rename it. I can easily call it newgreen and this is no an issue. But the behavior of it disappearing may baffle others as well.