Not handling hyphens, minus signs or whatever: it doesn't surprise me in the least.
Why don't eBook publishers use a typesetting system based on TeX or LaTeX? Good grief. I was formatting complex mathematical formulas and pretty printing them to Postscript and PDF before the lot of you were born. And not just text with mere hyphens.
Is there something I'm missing, or are eBooks a major step backwards in formatting? Really. I can't tell you how many computer science and mathematics eBooks I've returned to Amazon or B&N because of the sh***y formatting of code and math formulas. Not just when eBooks first came out, but on and on, year after year, and it doesn't get better. It strikes me as the laziness of corporations.