A single bevel knife, traditionally, has it's entire bevel on one side and is hollow backed. Yanagi, deba, and usuba being the big three.....but there are a crap load of other styles.
So, no, this knife is not single beveled. It's a double bevel knife. Yes, it's asymmetrically ground. To what degree, I'm not sure....probably 60/40 or so.
Try to follow the factory's grinding as best as you can. However, don't stress over it THAT much. Many people successfully use asymmetrically ground knives, sharpening them themselves, without ever knowing they are.
A great starter set:http://www.chefknivestogo.com/knshcoset.html