If you have a free Apple developer account, it's probably worth filing a bug at bugreport.apple.com about #1.
For #2, I would assume that @page:left and @page:right would be supported, but I'm not certain. If not, see my previous answer. :-)
Also, a word of warning: segregate your media queries into a separate file. Adobe Digital Editions (upon which a number of readers are based) interprets "not required/unsupported" as "should break everything if present" when it comes to CSS features, so if you use any @page or @media directives, everything in that CSS file is ignored by ADE, Nook, etc.
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