I, too, am sick of having to look everywhere on a site to find if stories have been printed previously, especially when they turn out to be ones I've read before. (As I recall, when I first saw the paperback site months ago there was no mention about "previously published"; that fact was added later from the Kindle site.)
This is the only book I've ever returned to Amazon because even though the shipping cost me a good percent of the price, I was so angry that I didn't even want to have it around. Since Christmas short stories seem to be the most prone to "recycling", I plan to NOT buy any again without first seeing the book in person. Not a good way to sell books, Amazon!!