Why do they do this? I don't know why. The list price is $14.95 and Amazon feels free to change it based on the market, the moon, the tides, or perhaps some other reason they haven't disclosed to us here at Liturgical Groove Productions.
All this to say -- if you see it selling extra high at Amazon, consider going to CDBaby.com, where you can get a discount on more than one copy (and hey, split shipping costs with your friends!) or directly through this website, where we send it to you media mail (slow and cheap) for $12.95 apiece and $2 shipping. CatholicChild.com carries it too. Or consider shopping at your local Catholic Bookstore, or visiting Nelson Woodcraft, who carry lots of nifty Catholic art and T-shirts as well as the CD.