Minor scales: Why are there unusual chords?

For reasons mentioned by other posters, these are the correct chords for the key in which they were written, so there was no mistake on the publisher's part. But you're not so crazy as some of these other posters might have you think -- as a clical musician at a conservatory studying to be a professional, I can tell you that I have NEVER seen a piece actually written in A-sharp minor; I'm not saying they don't exist, but there's a reason that composers don't write in keys like that -- it IS much easier to write in the enharmonically equivalent key, B-flat minor. E-sharp major and a Gx dim chord do exist, but more often in theory workbooks than in real pieces of music (when they are in real music, they are typically not frequently-used chords).