Does Alexa have a separate set of standards that allow them to ignore metatags that other search engines are supposed to ignore? Well, perhaps Alexa thinks it does, because the statistics package site is ignoring the 'noarchive' tag and one webmaster complains that 5000 pages are being archived by Alexa.
It seems that, according to IncrediBILL, Alexa only honors robots.txt files and not metatags (huh x2?) If you have a problem, you have to contact Alexa directly.
But why does Alexa think it's above the rules and can't respect/honor the directives in the HTML files themselves? Why should you have to go to them directly?
Forum discussion continues at WebmasterWorld.